Determine the Windows installation date using different methods

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There may be a time when you want or need to know your Windows installation date or the date and time you installed your Windows operating system on your computer. There are several ways to find out, which we will discuss in this paper.

Windows Installation Date

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1] The easiest way to find out when your Windows operating system was installed is to right-click the Windows folder , select the properties and display the Created front entry under the General tab. Here you see the time and date.

However, if you updated your version of Windows to a later version, you will see the date the previous version was installed, not the date the most recent version was installed or updated. In my case, it indicates the day Windows 8 was first installed – not the date Windows 8.1

2] The Windows installation date is also stored in Windows Registry in the next key, as UNIX time, i.e. as a 32-bit value indicating the time in seconds since January 1, 1970.

HKEY_LOCAL_MACHINESOFTWAREMicrosoftWindows NTCurrentVersionInstallDate


My Windows has been installed 1382359164 seconds since January 1, 1970, so you need to do some calculations to get the figure.

3] The easiest and most convenient way to find the Windows installation date is to use the systeminfo tool (16) we have already mentioned. To use this built-in tool, open a command prompt window , type the following and press Enter :

systeminfo | find /i installation date


You can see the original installation date.

4] The Windows installation date is also stored in property InstallDate of WMI class Win32_OperatingSystem. You can use PowerShell to get the installation date and time. To find the date, open Windows PowerShell as administrator, change the path to drive C, type the following and press Enter:

([WMI]).ConvertToDateToDateTime((Get-WmiObject Win32_OperatingSystem).InstallDate)


The Windows installation date and time is displayed !

Read now: How to know system availability.

Enjoy the rest of the day! 🙂

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