Windows 10: Why is my windows asking for activation key now

I really need help with this, I reseted my pc Becasue it was running slow and I wanted a clean start after I reseted my pc it asked for a activation key when I already entered a activation key, I used the pc like months and this happened like 1 month ago I didn’t really mind it much as it was not my main pc but now I want to solve this issue, I also can’t download any updates it says “we couldn’t complete the updates Undoing changes” I also tried scanning the system using this in command prompt: SFC /scannow but it doesn’t let m

:)

 

activate windows 7 oem key

There is no difference between the OEM disc and the Retail disc with Windows 7. A retail disc will accept a OEM or Retail key, and vise versa.

If the OEM Key wasn't going to work with the disc you have, it would have stopped you during the install when it first asked you for the key, not during activation.

What is likely the problem is that, since the OEM version has already been activated once, it is failing activation again. Activate it over the phone using the option given to you on the failed activation screen, and you shouldn't have a problem activating it.

 

windows 8 activation key

You can use a Windows key as many time as you want provided it's only on one computer at a time. If the automated activation fails, just call the number it provides. Six minutes later, you're activated again. If it asks you how many computers it's on, just say "one" and you're golden.

 

activate windows 7 oem key

Well it didn't stop me because I told the installation program to activate the key later, so I didn't put any key during the installation. Maybe can it work if I put the key when it asks me in the installation?