I can't find my old Windows 10 Pre-installed OEM Product Key

[Jasur-s]

I was using I can't Windows 10 Pre-installed Operation system with OEM Product Key, Then I wanted to use Windows 11 and downloaded it, After a while it asked to activate the product key which i lost and now I don't know what to do please help me to find my old product key

[Paul_Tikkanen]

Hi:

The W10 OEM product key should be encrypted in your notebook's BIOS.

Download, install and run the free Showkey Plus app from the Microsoft Store and it should show you the OEM product key and the version of Windows the key is good for.

ShowKeyPlus - Microsoft Apps

You should be able to activate Windows with the OEM product key.

[Jasur-s]

Is it possible to restore the old OEM product key I couldn't do it some say it's only for one time activation

[Paul_Tikkanen]

If the report shows the OEM product key in the BIOS and the version of W10 the key is good for, then you should be able to use it to activate the installation.  Make sure the version of Windows you have installed matches the version the key is good for (Windows Home for Home product key for example).

The key can be used over and over again for as many times as you need to reinstall Windows.

The report should provide two lines for product keys--an installed key and an OEM key.

If the installed key is different from the OEM key, change the installed key to the OEM key in the PC settings menu and you should be able to activate Windows.

If the report does not show an OEM product key, then somehow the key was erased in the BIOS and there would be nothing you could do to fix it.

I suggest you contact Microsoft for further assistance with activation issues.

Activate Windows - Microsoft Support

[Jasur-s]

I cound't activate my OEM product key, It's saying 0xc004f050 error code I search for some solutions but it's still not working