How long does it take to install windows 10 from a USB flash drive. Cleaning your computer from updates

Before upgrading to Windows 10, you need to make sure that your hard drive has enough memory to accommodate it. After the update is completed, you may be faced with the fact that the system takes up more than the expected volume, but there are certain reasons for this.

How much space will Windows 10 take

The amount of space occupied by the system depends on which bit depth is chosen - 32-bit or 64-bit. Installation ISOs are 2.4 GB for 32-bit and 5.5 GB for 64-bit. Recall that the bit depth determines whether the system can solve tasks in two threads or not, so focus on the number of processor cores, and not on the weight of the source file.

The installed system, according to official data from Microsoft, will occupy 16 GB if it is 32-bit, and 20 GB if it is 64-bit. Of course, the numbers are approximate and only relevant for the clean home version. Windows Professional and Enterprise editions do not differ much in size, but exactly 16 or 20 GB after installation will not work anyway.

Why the system takes up more space

You can face the fact that the system takes up more than the promised volume due to the transition to a new Windows through an update, rather than a clean installation. Performing a clean installation means deleting all files on your hard or SSD drives and booting the system onto a completely empty partition. If you upgraded to Windows 10 using this method, then the only reason for the system weight to be higher than provided is the downloaded updates.

After Windows is installed, it automatically checks and downloads available updates. Updates are downloaded into the computer's memory and stored there for some time, and only then are they erased. In addition, the system creates some backups by default in case you want to undo the installation of the latest versions by rolling back. These backups also consume disk space.

The second way to upgrade to Windows 10 is to upgrade from a previous version of the operating system. The peculiarity of this method is that practically all files and user programs are not deleted, but transferred to the new system. As a result, the hard disk is loaded not only with the bare system, but also with personal files and applications. That is, it was not Windows 10 itself that took up more space than it should have, but the elements that moved from the previous Windows.

There are two ways to upgrade to Windows 10: upgrade and clean install

But another reason for the appearance of excess weight is a backup of the previous Windows, created in case the user, for some reason, does not like Windows 10 and wants to return to the previously used version. By default, the created file is stored on the system partition of the disk and is automatically deleted after 30 days, which starts from the moment Windows 10 was installed. The backup copy can weigh several gigabytes, which greatly changes the size of the system. But you can delete it yourself, see the section "Deleting a backup copy of the previous OS".

Find out what memory is spent on

In Windows 10, there is a special tool that describes in detail what the memory of a hard or SSD drive is used for. You should use it to find out exactly why the system weighs more than expected:

1. Expand System Options. Opening system parameters
2. Go to the "System" block.
   Open the "System" section
3. Select the "Storage" sub-item. You will see several stripes corresponding to the different partitions into which the disk is partitioned. With the help of them, you can find out how much space is available at the moment. To go to a more detailed description of the section, click on one of them.
   Find out how busy the sections are in the "Storage" sub-item
4. The strip will be colored in different colors, each of which will correspond to a specific file type. The longer the strip, the more space this particular type of file takes. The empty space is gray. Below the bar is a detailed mapping of colors and their associated file types.
   There is a detailed list of what the disk memory is used for

After reviewing the above section, you can find out what elements caused the disk memory to decrease. Once you know this, you have to decide what to do with the files: delete them or keep them. But in any case, do not delete any system files, this will lead to system breakdown and, possibly, its complete unusability. The only exceptions are update and backup files.

Cleaning Windows after installation

If you are faced with the fact that after installing Windows 10 takes up too much space, there are three options: files from the previous system were transferred to the new one, updates were automatically downloaded, or a backup of the previous Windows was created. In the first case, you will have to decide for yourself which files and programs should be deleted, since this is your personal data. Before deleting, it is recommended to copy potentially important files to third-party media so as not to lose them permanently.

Cleaning your computer from updates

Before you start cleaning up updates, it's worth knowing that removing them may result in you being unable to roll back your system to a previous version, even if updates downloaded after cleaning break the system. It is also possible that the updates you are removing have not yet been installed, so they will be downloaded again as soon as the system gains access to the Internet. Therefore, it is worth rebooting the computer first, since updates are installed during the shutdown and startup process.

So, the downloaded updates are stored in the WinSxS folder, which has the same name in previous operating systems. Do not under any circumstances try to delete it itself or clear the contents through the "Delete" function in Explorer. The folder contains not only updates, but also other files that are useful for the functioning of the system. Removing them will cause Windows to stop working. Cleansing is strictly recommended only in the following way:

1. Expand Command Prompt as Administrator. Open the command line as administrator
2. Register and run the command Dism.exe / online / cleanup-image / AnalyzeComponentStore. The folder scan procedure will begin, at the end of which you will receive a report on its load and a system decision telling you whether to clean it or not. See the penultimate line printed.
   Run the command Dism.exe / online / cleanup-image / AnalyzeComponentStore
3. If the answer is yes, that is, Windows recommends cleaning the folder, run the command Dism.exe / online / cleanup-image / StartComponentCleanup. Successful completion of the procedure will correspond to the message "Operation completed successfully" displayed in the command line.
   Delete the contents of the WinSxS folder by running the command Dism.exe / online / cleanup-image / StartComponentCleanup

Please note that performing cleaning in the event that the system does not recommend doing this can lead to the opposite effect: the folder will grow in size.

Digging into Windows 10 settings, you can find the list of updates located in the Control Panel. There you can select an update and uninstall it. But you should not do this, since this list is already installed versions. Removing them will cause the system to roll back to a version that does not use this update. By uninstalling an update that is already installed, you will no longer have the current version of Windows 10.

Video: clearing Windows of updates

Deleting a backup of the previous OS

The backup created after the upgrade to Windows 10 will be automatically erased 30 days after the upgrade to the new system. If you do not want to wait and are sure that you do not want to revert to a previously used version, you can delete the copy yourself:

1. Hold the Win + R combination on the keyboard to bring up the "Run" window. Enter the cleanmgr command in it and click "OK" to invoke the cleaning wizard.
   We execute the command cleanmrg
2. Select the system partition of the disk (by default, partition C), since this is where the copy is stored. Selecting the system partition of the disk
3. Expand the list of system files by going to clean them up. We select three items and start deleting
4. An alternative method is to run the RD / S / Q "% SystemDrive% \\ Windows.old" command from a command prompt running as administrator. But it is better to use the above method, as it allows you to at the same time delete other unnecessary files associated with the previous and new system.
   We execute the command RD / S / Q "% SystemDrive% \\ Windows.old"

Compact OS function

Windows 10 has a feature designed to reduce the size of system files by compressing them - Compact OS. It reduces the size of the system by about 2 GB when using the 64-bit version and by 1.6 GB when using the 32-bit version.

This feature is more suitable for tablets using Windows 10, as they usually have very little memory. But it can also be used on computers, taking into account that performance will decrease, since all files will be archived, as a result of which the computer will have to unpack them every time it is accessed. It is recommended to use compression only on powerful assemblies with a powerful video card and processor. Of course, it is rare to find high-performance components connected to a small hard or SSD drive, on which even the system does not fit.

But if this is your case, or you are ready to sacrifice speed for the sake of space, then follow these steps: run the command line as administrator and run the command compact / compactos: always in it. The compression procedure will begin, it may take more than half an hour, the compression speed will depend on the processor's performance and the recording capacity of the disk.

If you want to disable compression in the future, run the compact / compactos: never command. Performance will return, but the volume of the system will be restored to its previous size.

The system can take up more than it should, for three reasons: files were transferred from the previous Windows, backups were created, or updates were downloaded. Personal files must be sorted and deleted yourself, and updates and copies are erased through the system bar or Windows 10 tools. In some cases, it is worth using the Compact OS function.

Windows 10 is an operating system for a long time. Microsoft announced that no new versions (in the usual sense) will be released, and the development of the system will be permanent updates. Many Windows users want to be on the wave of progress, so they are switching to the newest and most advanced operating system in the world. But those who want to upgrade will have a lot of pitfalls, especially for owners of computers two or three years ago: from incompatibility of motherboards and components to the lack of support for some processors. As a result, the installation attempt ends with an error or the process hangs.

Installing Windows 10 over the Internet

Microsoft believes that the most logical way to install Windows 10 is to update the current version of the system via the Internet (this way you can upgrade from Windows 7 and 8), for which you can download the Get Windows 10 application from the company's website, which will do all the work on its own, and in the background: will download the necessary components, install drivers, save user data.

Many power users prefer Clean Install — installation from removable media — to keep things in check. The best media for such an installation is a bootable USB flash drive with an image of the operating system distribution kit. The problem is that OS tools format the USB flash drive as a disk with an MBR partition. On computers with UEFI (that is, most modern ones), installing a system from such a flash drive will fail, and the installer will not see the file partition.

If you don't want to face an error, prepare a GPT bootable disk. The program that will do it quickly and for free is Rufus.

Video: creating a bootable USB drive in Rufus

The disk contains an MBR partition table

When booting in UEFI mode, Windows 10 Setup will not be able to install the system to a disk with MBR partitions. This situation is possible if the operating system Windows 7 or lower was previously installed on the disk. As a result, a warning is displayed on the screen and the installation is suspended.

To proceed with the installation, you need to convert the disk to GPT format. There are two ways to solve this problem: fast - with the loss of all data on the disk - and slow, with the preservation of information. If you don’t need the information, or if it’s just a disc from the aftermarket that was in use, the first method would be optimal:

1. After receiving the warning about MBR partitions on the disk, press Shift + F10: this will open a command prompt window.
2. Enter the following commands in sequence:
   • diskpart;
   • list disk - the program will display a list of disks;
   • select disk n - select the drive to be converted;
   • clean - deletes all partitions;
   • convert gpt - convert disk to GPT format;
   • exit.
3. Close the window and click the Refresh button on the partition selection screen.
4. Select unallocated disk space for installation and continue: the error will no longer appear.

To implement the second method - converting a disk while saving data - you will need a software package for working with disk partitions. Let's dwell on the Minitool Partition Wizard program: it is free, and you can download an image of a bootable USB flash drive from the manufacturer's website.

Messages about the inability to install the system on a disk with MBR partitions can be avoided by switching the boot mode to Legacy in the BIOS settings. But this is a temporary solution, which will then lead to a decrease in the performance and reliability of the system. The best option would still be disk conversion.

Windows 10 won't install on a solid state drive (SSD)

When installing Windows 10 on an SSD, you may encounter errors such as "endless installation": at a certain stage, the computer restarts and starts the installation again. There is also such a nuisance as a critically low access speed to the SSD - the installation can take 12-15 hours. In addition, sometimes the installer does not recognize the drive and the SSD is not displayed in the drive selection window. To get rid of such errors, you should take a few simple steps:

1. Download the latest BIOS version from the official website of the motherboard or laptop manufacturer and install it according to the instructions given.
2. In the BIOS settings, be sure to enable the boot type - UEFI.
3. On the Peripheral Settings screen, select the SATA controller operation type - AHCI.
4. If the computer has internal drives in addition to the SSD. Disable them before starting installation by disconnecting the cables from the motherboard.
5. When the installation starts, on the drive selection screen, you should delete any partitions on the SSD, if any. Install the system to an unallocated area, letting the installer create and format the partition automatically.

   Select the unallocated area to install the system

Video: Install Windows 10 on an SSD

Blue screen when installing Windows 10

Blue Screen, also known as Blue Screen Of Death (BSOD), is a Windows diagnostic message about a critical error, after which the system cannot work. Errors can occur both during the installation of the operating system and during its further operation.

Most often, such errors appear when there is a problem with the hardware of the computer.To get rid of the error, you can take the following steps:

1. If the options for overclocking the processor and RAM are enabled in the BIOS of the motherboard, disable them.
2. Check the amount of installed RAM. If there are multiple slats installed, try leaving only one of them before running the installer. This will put the memory controller in single-channel mode - slow but robust.
3. Disconnect all peripheral devices except those required during the installation phase.
4. Make sure that the bitness of the OS distribution and the bitness of the processor in your computer match. When trying to install a 64-bit OS on a 32-bit processor, the installation will fail. You can check the processor bit capacity with the free CPU-Z utility.
5. Remove the hard drive and install Windows 10 on another computer that doesn't get the error. After the installation is complete, put the disc back and try to boot normally.

Black screen when installing Windows 10

One of the common problems is a black screen (with or without mouse cursor) after installing the operating system. This error most often appears on computers with discrete AMD and NVidia video cards, this does not happen with integrated video. It is possible that the computer installs the downloaded updates: in this case, you should wait 15-20 minutes until the welcome screen appears. If the wait does not lead to a positive result, you should restart the computer, and then disable the system quick start function (this is guaranteed to fix the problem of a black screen with AMD or NVidia video cards).

Windows 10 takes too long to install

Let's take a look at the group of errors that make the installation of Windows 10 take too long. In normal mode, on an average computer, a complete system installation takes no more than 35-40 minutes, on a system with an SSD - 3-4 times faster.

Windows 10 freezes at logo when installing

This problem is most commonly encountered when trying to install Windows 10 on one of Samsung laptops. Some time ago, the company stopped producing laptops, stopped buying OEM versions of the operating system. Therefore, Microsoft removed support for these laptops from the distribution. As a result, the installation program hangs at the system logo, that is, at the very beginning.

You can install the operating system by dismantling the hard drive, which is connected to another computer, where the operating system installation procedure takes place. Then the disk is returned back to the laptop and after the automatic configuration phase Windows 10 works fine on it.

Windows 10 hangs on preparing files for installation

This error occurs when upgrading Windows 7 or Windows 8 using Windows Update. The progress of the installation can stop at an arbitrary place and not increase indefinitely. In this case, the best option would be to install the operating system from a bootable media (flash drive). On the start screen, you will be able to select the installation mode - "Update" - and all your data and the programs installed in the previous version of the OS will be saved.

Windows 10 installation stalled at 0%

This issue occurs when trying to upgrade to Windows 10 from previous OS versions. The Update Center error does not allow the installation of a new system, when you try you receive the message "There were some problems installing updates ..."

To make the installation of Windows 10 possible, you need to run a special script that will reset all Windows Update errors.

1. Create a file "Notepad" and write the following commands in it (without a semicolon):
   
2. Save the file as winupdate-reset.bat.
3. Click on the PCM file icon (right mouse button) and run it as administrator.
4. Close the script window and restart your computer.

Now you can run the upgrade to Windows 10 again - there will be no errors.

Windows installation aborted with 25% error

At 25%, Windows 10 installation may freeze with error code 0xC1900101.

The error indicates a conflict between the peripherals and the installer. Although Microsoft does not provide any official instructions on how to fix it, you can achieve a normal installation of the system by following these steps:

1. Use a flash drive when installing Windows 10. Installing and updating from the operating system or from an optical disc increases the risk of error 0xC1900101.
2. Disconnect all peripherals, leaving only the keyboard and mouse.
3. Disconnect all SATA and ATA drives except the one where the system is being installed.

Installation hangs at 32 or 99%

If the installation hangs after 32%, this is a feature of the system update mechanism and not a bug. The amount of data that needs to be downloaded from the Internet is about 10 gigabytes, and the number of files is in the tens of thousands. Depending on the speed of the Internet connection of the central processor and the amount of RAM of the computer being upgraded, the installation procedure for Windows 10 may take a long time. Sometimes the process can last almost a day.

During the update, there are several "checkpoints", during the passage of which the process slows down so much that it seems as if the updater is "stuck". You just have to wait in such cases as:

• on a black screen with a blue circle in the range of 30-39% when Windows Update downloads all dynamic updates for Windows 10 from the network;
• by 96–99% when Windows is backing up user data;
• while the message “This will take a little longer than usual, but it will be ready soon” remains on the screen.

You can dramatically speed up the update process by disconnecting all USB peripherals and additional monitors, if any.

Video: how to install Windows 10 if the installation is stuck at 99%

Windows 10 does not create partitions when installing

This error occurs when trying to install an OS to a disk with a partition table already created. There are no unallocated areas on the disk, the installation program cannot create additional hidden partitions for system needs and gives an error message "Failed to create a new or find an existing partition."

In order for the installer to create the structure of system partitions necessary for the OS to work, you must either delete the existing partitions from the disk (in this case, all data will be lost), or the program for working with partitions reduces those on the disk. Thus, approximately 700 MB of space will be freed up and installation will be possible.

In the first case, select the existing section with the cursor without leaving the disk selection window, and click "Delete". Then, in the same way, allocate the freed up free space and specify it for further installation of the operating system.

In the second case, you will need a bootable USB flash drive with the Minitool Partition Wizard program.

Windows 10 installation reboots 64%

The error occurs after installing the cumulative update KB3081424 (or using the installation disk, where this update is already integrated). The installation program scans the system registry and, if it finds entries for non-existent users, crashes, after which the update tries to install again - and so on ad infinitum. To fix the error, you need to edit the system registry:

1. After restarting your computer in Safe Mode (hold down the F8 key at startup), launch the Registry Editor through the command line interface.
2. Go to HKEY_LOCAL_MACHINE \\ SOFTWARE \\ Microsoft \\ Windows NT \\ CurrentVersion \\.
3. Delete the ProfileList key.
4. Restart your computer and continue with the installation or system update.

Windows 10 installation window does not appear

A very rare error that occurs when installing other systems of the Windows family. Appears on configurations that include a floppy disk drive. Solution to the problem - using BIOS settings, disable the drive and set the value disabled in the Drive A (B) line.

No device drivers found

During the installation process, the installer reports that there are no drivers for the drive and stops. It is not possible to proceed with the installation.

The reason is the USB 3.0 standard port to which you have a bootable USB flash drive with the system distribution kit or a portable hard drive connected. To fix the error is very simple - switch the drive to another USB 2.0 port. It is very easy to distinguish it: USB 3.0 ports are blue, and 2.0 ports are black.

Windows 10 installation errors - official guides

Microsoft has published at least two articles devoted to troubleshooting errors when installing Windows 10 or upgrading to it from older operating systems. These are detailed guides with error codes and short descriptions. These are Windows 10 Upgrade and Install Errors Help and Windows 10 Upgrade Errors Troubleshooting. You can find them in the "Documents" section.

Please note that you can access the Microsoft knowledge bases, including the articles mentioned, if you have a Microsoft account. If it is not there, do not be lazy to spend 15 minutes on registration.

The errors and solutions discussed in the article are typical, that is, they occur on a wide variety of configurations. At the same time, there may be errors "floating" - occurring with an unpredictable frequency, which are very difficult to track and systematize. The stability of the OS and the absence of problems with its installation are closely related to the quality of the components from which the computer is assembled. Use RAM modules of proven brands, hard drives without errors and damage, and a reliable cooling system. It's much easier to prevent mistakes than to deal with them in the process.

Windows 10 left the Technical Preview in August. Now not only enthusiasts and technicians can use it. The new operating system is better and more convenient than all previous versions of "windows". Anyway, at the moment. However, many users are wondering "is it worth installing Windows 10 on your laptop?" The alternative for them is to stay on the previous stable version. In this article, we will reveal the benefits of using the new product from Microsoft, as well as explain in detail and step by step how to install Windows 10 on a laptop.

Benefits of using Windows 10

Let's try to answer the most important question: is it worth installing a fresh version of the operating system from Microsoft? You will not find any stunning or revolutionary innovations compared to 8.1. However, in every component the operating system has improved both in speed and controllability. Here are just five points that any laptop user might be interested in.

• The most important news for everyone who has taken hostility to the "tiles" of the eighth version - the return of the familiar desktop Start menu. It has become much smarter and more convenient to use. To run any program, you just need to type the first couple of letters of its name. The Live Tiles have not gone anywhere, they have moved to the Start Menu bar.
• The significantly improved Mail and Calendar application will finally allow you to fully work with mail in standard Windows applications.
• The new Edge browser is much faster and smarter than its slower predecessor IE.
• The setup menu became clear to the user. A short list of the main points, provided with clear large pictograms. But the main achievement is a convenient search for settings. Just write what you need and get a rough list of settings that will help you.
  
  
• The synchronization of files with the cloud storage OneDrive and smartphones under all popular mobile OS has been thought over and improved.

And this is not a complete list of all the updates and innovations. So let's start installing. A step-by-step guide will help you understand all the main points of this process and do everything yourself.

Is your laptop ready for Windows 10?

Experts advise against using third-party utilities of dubious origin. Moreover, this time Microsoft specialists are really well prepared, and their utilities are reliable and easy to use.

What's the best way to install Windows 10 on a laptop?

Microsoft experts themselves recommend the so-called "clean" installation of Windows 10 from scratch, from a boot disk or flash drive. But judging by user reviews, since version 8.1 there is a much simpler option. Installing Windows 10 via Update Center. Just update the G8 with the latest service packs and receive an invitation to download and install the tenth version. When everything is ready, Windows 10 will automatically install on the laptop via the update center. The image size is 3.5 GB, so you need to provide enough free space on the system drive.

How to install Windows 10 from a USB stick or DVD?

To install Windows 10 from a flash drive or disk, you need a system image that can be downloaded from the above support page of the official website. There you will also find a utility for writing an image to a flash drive. Click on the Download tool now button, after selecting the version:.

The program is called Media Creation Tool.

Important notes about installing and using Windows 10 on a laptop

In this new version of Microsoft's operating system, there are a few things to keep in mind.

• • Windows 10 separates the concept of applications and user data even more clearly than in the G8. Never place your documents and photos on the system drive. If you ever need to do a full system reset, they can be removed. But the system also recovers completely, even if system files and applications are damaged.
  • An Internet connection is required throughout the installation of Windows 10 on a laptop to download important update files and device drivers.
  • When installing "tens" on an old laptop, released more than five years ago, make sure that there are drivers for this version of the OS for all devices in the laptop. For example, support for some sound cards is still limited.
  • The installation disc or flash drive can be left in case of system recovery after a serious failure. But this happens very rarely. Therefore, most users do not save the recovery disc. You can always make a new one.
  • It is not recommended to use pirated distributions for installation... Your laptop's operating system needs constant updates, which is not guaranteed by the pirated installation kit.
  • After installing Windows 10 on the laptop, it will not be superfluous to install an antivirus. Many free programs: AVG, Avast, for example, have already released their versions under the top ten.

Is it worth installing Windows 10 on a laptop? The answer is yes. The laptop will run faster, and you will get new applications and an easier-to-manage OS. To be honest, there isn't much to customize. This is the first version of the OS that works great out of the box.

Greetings!
The need to find out the date and time of the installation of the Windows 10 operating system may be dictated not only by interest, but also by other reasons.
Whatever they are, this guide will help you in solving this issue. There are several ways to get the information you need.

1 way

Press the key combination on the keyboard Win + X and in the opened context menu select the item Command Line (Admin).

In the window that opens, enter the command:

systeminfo | find "Installation Date"

And press the key Enter

After a short time, the date the Windows operating system was installed is displayed.

2 way

Follow the similar steps as described in the first method, only in the command prompt window enter the following command:

Wmic os get installdate

As a result, the installation date will be displayed, which should be read as follows: year, month, day, hour, minute, second.

3 way

Open Windows search and type Windows PowerShell... Then launch the displayed application.

In the window that opens, enter the following command:

("") .ConvertToDateTime ((Get-WmiObject Win32_OperatingSystem) .InstallDate)

And press Enter

This will display the date you are looking for.

4 way

This method will help you find out the date of installation of Windows 10, on which the "major" update was installed.

It is common knowledge that after installing the next "major" update of Windows 10, the installation option is updated. But not all system parameters and files are updated, for example, win.ini and system.inithat are located in the Windows folder on the system partition, retain the modified date, which corresponds to the date of the first installed Windows 10.

Short summary

As you can see find out the date of installation of the Windows operating system is not difficult. I hope that the information received will be useful for you and will solve all the tasks.

This instruction contains several simple ways to view the date and time of the installation of Windows 10, 8 or Windows 7 on a computer, both without using third-party programs, but only using the operating system, and through third-party utilities.

I do not know what exactly information about the date and time of Windows installation may be required for (apart from curiosity), but the question is quite relevant for users, and therefore it makes sense to consider the answers to it.

The WMIC command allows you to get very different information about Windows, including the date it was installed. Just type in the command line wmic os get installdate and press Enter.

As a result, you will see a long number in which the first four digits are the year, the next two are the month, two more are the day, and the remaining six digits correspond to the hours, minutes and seconds when the system was installed.

Using Windows Explorer

The method is not the most accurate and not always applicable, but: if you did not change or delete the user that you created during the initial installation of Windows on a computer or laptop, then the date the user folder was created C: \\ Users \\ UserName exactly coincides with the date of the system installation, and the time differs by only a few minutes.

That is, you can: in the explorer go to the folder C: \\ Users, right-click on the folder with the username, and select "Properties". In the information about the folder, the date of its creation (the "Created" field) will be the date you need to install the system (with rare exceptions).

System installation date and time in Registry Editor

I don't know if this method will be useful to see the date and time of the Windows installation for someone other than a programmer (it is not very convenient), but I will give it too.

If you start the registry editor (Win + R, type regedit) and go to the section HKEY_LOCAL_MACHINE \\ SOFTWARE \\ Microsoft \\ Windows NT \\ CurrentVersion then in it you will find the parameter InstallDatewhose value is equal to the seconds elapsed from January 1, 1970 until the installation date and time of the current operating system.