So you got a newly imaged PC and know it came with windows but you do not have a Windows 10 / 11 activation key. Well, you have come to the right place, my friend. The first step is to ensure that the computer was installed with the correct Windows version that the hardware was licensed for.
If you know it was installed with the correct version then you are golden as the product key is embedded into the firmware of the motherboard.
Here is how you locate your product (license key):
Press Windows key + X
Click Command Prompt (admin)
Enter the following command:
wmic path SoftwareLicensingService get OA3xOriginalProductKey
The product key will be revealed, copy the product key then enter it
Click Start > Settings > Update & security > Activation > Change the product key then enter the new product key then click Next to Activate
If you are unable to activate Windows 10 after all the above and you are certain you have the correct edition installed, then please attempt phone activation: Contact – Microsoft Support
All done! Enjoy your Windows experience
Do you want to learn more? Follow this link: Activate Windows (microsoft.com)