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How To Check When Windows 10 Was Installed

Every time an operating system Is Installed, whether you do It yourself by formatting your computer or via an OEM Installation by the manufacturer, Windows keeps an exact timestamp of when It took place. Be It for upgrading purposes or any other reason, It's handy to know precisely when your current Windows 10 OS was Installed. In this tutorial, I will show you how to check It natively within Windows, without the aid of third-party tools.

The Information Is usually stored In the Windows Registry, however It's not as simple as viewing It In a readable format. For Instance, I've opened the Registry and navigated to the following directory.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion

On the right pane, the Install Date & Install Time Is listed, as per the Image below.

The values are obviously not legible In their respective date & time format, and do require some calculations to Identify the exact figure. I won't go Into this, but rather demonstrate a couple of very simple methods of checking your current Windows 10 Installation date, by using the Command Prompt and PowerShell.

The process Is achieved by executing a few commands, so without further delay, let's get this tutorial started.

Step One:
Firstly, I'll use the Command Prompt. To access It, open the Run menu, enter cmd and hit OK.

Step Two:
The Command Prompt will now open, so enter the following command.
SystemInfo | Find /i "Install Date"

Windows will now begin to gather Information about your operating system, so be patient whilst It performs It's task.

Step Three:
Once It completes, the exact original Installation date will be returned- to the second! You can clearly see mine below.

Step Four:
Now let's checkout how to do It, by using PowerShell. Open the Run menu, enter powershell and hit OK.

Step Five:
PowerShell will now open, so enter the command as per below.
(Get-CimInstance -Class Win32_OperatingSystem).InstallDate

Your command will look the same as mine.

Last Step:
I've now hit the Enter key on my keyboard and as you can see, the exact Install date has been returned.

Final Thoughts:
You'll notice that I've emphasized the word current, quite a number of times, and with very good reason. That's because this applies to your current Windows 10 Installation, and not previous Installs nor subsequent upgrades (If any). For example, If you've formatted your PC 3 times, this method will show the last (currently-Installed) Windows Installation date & time.  That Is, the operating system you're actively running.


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