This post shows students and new users the steps to find out the date and time Windows was installed on a computer. There are times when you want to know the date and time Windows was installed on a computer.

There are a few ways to determine the date and time Windows was installed on a computer. If you want to know how old a computer is or if Windows has been reinstalled, check the installation date.

One thing you should know is that the installation date may not be accurate. This is because if you have upgraded to a newer version of Windows (for example, upgraded from Windows 10 to Windows 11), the original installation date that is displayed is the date of the upgrade.

You will see how this can be misleading as the original installation date has been changed to the date you upgraded.

Anyway, this might be something you want to know and know that it is there when you want to find out the Windows installation date.

How to know the date Windows was installed?

If you want to know how old your computer is, check the Windows installation date. It will tell you when Windows was installed or updated to a new version.

Follow the steps below to find out the Windows installation date:

First, click on the Start Menu, then search Symbol of the system. Under Best Match, select the Command Prompt App As shown below.

Windows 11 look for command prompt 1

When the command prompt application opens, type the commands below and press Enter.

systeminfo|find /i "original"

The result should be something similar to the one shown below.

Output:
Original Install Date:     6/29/2021, 8:09:01 PM
Windows finds the installation date

Alternatively, type the commands below to show you the installation date.

systeminfo

The command should generate something similar to the following lines:

....................
OS Build Type: Multiprocessor Free
Registered Owner: Richard
Registered Organization:Product ID: 00329-10280-00000-AA805
Original Install Date: 6/29/2021, 8:09:01 PM
System Boot Time: 11/18/2021, 3:29:03 PM
System Manufacturer: innotek GmbH
........................
Windows finds the original installation date

How to find the Windows installation date through the registry

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You can also find the date and time that Windows was installed or updated from the Windows registry.

First, open the Windows Registry Editor.

Navigate to the path below.

HKEY_LOCAL_MACHINESOFTWAREMicrosoftWindows NTCurrentVersion

Once in the folder above, locate the «InstallDate” wrench. Please select Decimal to get the decimal value, which is the date in epoch time. Go to the site below to convert to use vintage converter to convert that value to a readable date and time.

You should do that!

Conclusion:

In this tutorial we have seen how to know the date and time when Windows was installed. If you find any errors above or have something to add, use the comment form below.

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