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This product key didn't work. Please check it and try again Windows 8 Activation Error

This product key didn't work. Please check it and try again Windows 8 Activation Error

When trying to activate Windows 8, it showed an error saying “This product key didn't work. Please check it and try again”, It was a valid key received from Microsoft. After Some search I found that I will have to call Microsoft Customer care to solve this issue.

Then I found this article which solved my issue

Steps

You need to open a run box and type: "Regedit"

Then located this key:

HKEY_LOCAL_MACHINE/Software/Microsoft/Windows/CurrentVersion/Setup/OOBE/

And find the one called "MediaBootInstall".

Double click that and change it from a 1 to a 0.

Then open up cmd as an administrator

Type the command "slmgr /rearm"

You will get a restart your computer messge.

Restart

Then when your computer restarts you need to open a run box again and type "slui.exe 3"

Now enter your product key and activate :)

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