Windows 8.1 asking for activation key?


My Windows 8.1 PC is asking for an activation key when I have already put it in a few months ago?

I turned on my PC, and it booted up normally, I knew it was activated as the Start screen was changed, but when I went to change my desktop background the PC restarted and now it wants me to activate windows?

Any suggestions on what to do?


4 answers Last reply
More about windows activation key
  1. Do you still have the key?

    Try entering it.
  2. Otherwise you can always call Microsoft and do the activation over the phone.
  3. Hi Rayan, i also facing same error, i also try to contact at given contact numbers(where activation code required) but could not connected with.
    if you found please share me at, ""

    advance thanx for anticipation

  4. I got this error as well. I was on the internet checking my email etc. I rebooted my computer and it told me to activate windows. I contacted Microsoft and they told me your product key was invalid. Weird Huh because my laptop cam preinstall windows windows with a licence key number.
    Step 1:
    Try a system restore before the error occured
    Step 2:
    If system restore did not work download this software
    it will find your product key.
    Step 3:
    After finding you windows product key activate over the phone.
    Step 4:
    To activate over the phone go to the search bar and search slui 4 (run as admin) and select your county
    Step 5:
    Follow the instruction on screen
    Ta da activation problem fixed!
    Buy a new key
    Or email me at and I will remotely fix your computer for free. Just mention toms hardware and give the link to the post and I will use ammy to remolty connect to your pc and fix it free of charge.
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