I am also suffering from the same issue, can please help me sort out the activation key
Windows 11 fails to activate after upgrading from Windows 10
I have recently received a laptop from my university which came with a pre-installed windows 10 enterprises edition. The windows 10 is already activated as it shows in the activation tab in the settings. But when I updated my windows 10 to windows 11, the windows 11 gave an error of activation failure as no product key was found by windows. I have tried command prompt and powershell to get the windows product key but all in vain. Besides, I have used the ShowKeyPlus to check for the product key and under the installed key section it says "MAK key not available" and under OEM key it says "OEM key not present in the firmware. " For now, I have downgraded to windows 10 and I have checked again my windows activation status and it shows that windows is activated and only the last 5 letters of product key are shown and rest are hidden as XXXXX. I want to upgrade my windows 10 to windows 11 but every time I try I get the same error. How can I solve this problem?, I am currently on windows 10.