How can I tell when Windows was installed on a computer?

Windows Installation Date

To find the installation date of your Windows 10 OS:

  1. You may see the Windows folder Properties
  2. Check the Windows Registry
  3. Use the systeminfo command-line tool
  4. Use a PowerShell command.

1] Windows folder Properties

The easiest way to find out when your Windows OS was installed, would be to right-click the Windows folder, select Properties and see the entry in front of Created under the General tab. Here you will see the time and date.

But if you have upgraded your Windows version to a

But if you have upgraded your Windows version to a higher version, you will see the date when the earlier version was installed and not when the latest version was installed or upgraded. In my case, it shows the day I first installed Windows 8 – and not the Windows 8.1 date.

2] Check the Windows Registry

The Windows Installation Date is also stored in the Windows Registry in the following key, as UNIX time, ie as a 32-bit value displaying the time in the number of seconds since 1st Jan 1970.

My Windows was installed 1382359164 seconds since

My Windows was installed 1382359164 seconds since 1st Jan 1970, so you need to do some calculations to arrive at the figure.

3] Use the systeminfo command-line tool

The easiest and the most convenient way of finding the Windows Installation Date would be to use the systeminfo tool, which we have already talked about. To use this built-in tool, open a command prompt window, type the following, and hit Enter:

You will be able to see the Original Install Date.

You will be able to see the Original Install Date.

Read: How to find the Installation date for apps and programs?

4] Use a PowerShell command

The Windows install date is also stored in the property InstallDate of the WMI class Win32_OperatingSystem. You can use PowerShell to get the date and time of installation.

To find out the date, open Windows PowerShell as Administrator, change the path to C drive, type the following, and hit Enter:

The date and time your Windows was installed will

The date and time your Windows was installed will be displayed!

Now read: How to find out System Uptime.

Enjoy the rest of the day! 🙂



Windows.old: explanation and instructions for deleting the folder

Windows offers a variety of features to ensure that the system functions over the long term. For example, the operating system generates a backup folder called Windows.old during new installations, upgrades or major updates which can be used to restore the system to its previous state. In our article, you will learn about the circumstances in which you can remove Windows.old and how to do so.


The install date is stored in the property InstallDate of the WMI class Win32_OperatingSystem. Without conversion, we would get a string like "20090917155854.000000+120".

Reinstalling Windows 10/11 isn’t always a perfect solution

Though there are several methods to choose, they all have some shortcomings in practical use. For example, the first method will keep your programs, but won’t fix problems caused by them. And the other two methods can only keep your files, so you have to spend time and effort reinstalling these apps. That’s why I say reinstallation is not a perfect way.

To avoid such trouble, you can use a free backup software to create a system image in case of possible system issues. This way, even if your computer fails in any way, you can use this system backup to restore and use it normally without losing data. For simplicity and effectiveness, I strongly recommend you AOMEI Backupper Standard to protect your Windows 10/11 PC.

✦ It enables you to backup file, partition, system or even the whole disk in a simple manner. ✦ It can save you from manual operation with the scheduled backup on daily, weekly, monthly, etc. ✦ With the  mode, it will only backup changed files instead of all files, which greatly reduces the risk of the backup disk full issues.  ✦ You can change the compression level, split backup images, use Microsoft VSS service and intelligent sector backup as you like. ✦ It supports multiple Windows operating systems, such as Windows 11/10/8.1/8/7/XP/Vista.

Download this software to create a backup image right now with the following steps.

What version of Microsoft Office do I have?

If you’re experiencing compatibility issues or error messages with Microsoft Office applications, it’s important to have the version number of the Office program you’re using to hand. Because the error messages you’re getting largely depend on the Office version you’re using. We’ll show you how to find out what version of Office you have in Word, Excel, PowerPoint, OneNote, or Outlook.

How to Access the WindowsApps Folder in Drive C?

In this part, we will show you how to open the WindowsApps folder in drive C to view the apps installed from Microsoft Store.

Step 1: Show Hidden Files and Folders on Windows 11/10

Show hidden files and folders on Windows 11

1. Open File Explorer.

2. Click the 3-dot menu on the top toolbar and select Options.

3. The Folder Options interface pops up. Then, you need to switch to the View tab.

4. Under Hidden files and folders, you need to make sure that the Show hidden files, folders, and drives option is selected.

5. Click Apply.

6. Click OK.

Show hidden files and folders on Windows 10

  1. Open File Explorer.
  2. From the top toolbar, go to View > Options > Change folder and search options.
  3. Switch to the View tab.
  4. Select Show hidden files, folders, and drives under Hidden files and folders in the Advanced settings
  5. Click Apply.
  6. Click OK.

[SOLVED] Show Hidden Files Button Not Working on Windows 10 – Fix Have you ever encountered Windows 10 show hidden files not working issue? Some solutions and files recovery tips are introduced here to deal with it. Read More

Step 2: Gain the Read Permissions to Open the WindowsApps Folder

After showing hidden files and folders in File Explorer, you can go to the Windows 11/10 Store apps location (that is C:\Program Files\WindowsApps). You can see that you can only access the Program Files folder. When you click the WindowsApp folder, you will see an interface pops up, saying You don’t currently have permission to access this folder. Click Continue to permanently get access to this folder.

Now, we will show you how to obtain the permissions to open this folder.

1. Click the Continue button.

2. On the next interface, click the security tab link to continue.

3. WindowsApps Properties interface pops up. Switch to the Security tab and click the Advanced button to continue.

4. Click the Change link to continue.

5. Click Advanced on the next interface.

6. Click Find Now.

7. Select the user name you want to permit to open the WindowsApp folder.

8. Click OK.

9. Click Apply.

10. Click OK.

11. Click OK.

12. Close File Explorer. Then, go to C:\Program Files\WindowsApps. This time, you should open the WindowsApps folder successfully.

What does not work

I first came up with the idea of querying the creation time of the Windows folder. This does not work because, beginning with Vista, the setup process is image-based. The only thing we can learn from querying the creation date of the Windows folder is when the installation image was created by Microsoft.

My second idea was to use the creation date of a file or folder created right after setup. Here is how I looked for a likely candidate:

Of these results, only the folder “Recovery” is pretty much identical to the “official” install date as recorded by Windows. But using such a method seems way too fragile for production use. Another failed attempt is to use the date of the oldest event log entry as can be seen from the following screen shot:

Wrapping things up

Wrapping things up

To reinstall Windows 10 without losing data is surely possibly using these three methods mentioned above, and it can fix system issues that your computer may have. But, honestly, it’s not perfect. And it is obvious that restoring from a backup is easier and more convenient to solve Windows issues.

The basic version AOMEI Backupper Standard is enough to prevent unexpected disaster, such as, system crash, disk failure, virus, fire etc. But if you want more advanced features, such as, USB plug in, incremental and differential backup, universal restore, you need to upgrade from the basic version. 

If you want to protect unlimited computers within your company, AOMEI Backupper Technician is worth a shot. The inbuilt AOMEI Image Deploy tool allows users to deploy/restore system image file on a server-side computer to multiple client-side computers over the network. What’s more, you are able to create portable AOMEI Backupper that can run from a removable device on any computer. You can download this software to explore more features!


Leave a Reply

Your email address will not be published.