Windows 10: Recover Windows activation key

My computer is showing Your windows activation licence will expaired very soon please update activation key , however I do not know the windows Activation key actually my pc was damaged and went to service centre and repaired the pc and they installed windows in my pc, Now how can I recover windows activation key and solve my problem . Please help me,

:)

 

Need to recover files from my Memory card

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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 8.1 pro + WMC key activation

This worked for me last time with a Win 8 key.

Install Windows 8.1 and enter KMS key during setup. Once in windows change product key to my Windows 8 key. Go to add features and enter my WMC add-on key. Drink a beer to a job well done.