windows says that I don't have a genuine copy of windows

Ever since I reset my Windows, it says that mine is not genuine. I have a OEM windows 7 64bit.

Now that's the one problem linked to the main one.

1 fine day I decided to take out my GPU for cleaning. Used some compressed air to blow off dust. After reinserting card, PC doesn't start. So I reset CMOS. PC starts, but with thousands of problems. So I reset windows. Another bunch of problems, like this one :(

 
Solution
When you try to activate and it fails, it should give you the option of doing it by phone. Try that.

You read a long series of numbers in, and it reads a long series of numbers back.
NOT the same numbers as your license key.

USAFRet

Titan
Moderator
When you try to activate and it fails, it should give you the option of doing it by phone. Try that.

You read a long series of numbers in, and it reads a long series of numbers back.
NOT the same numbers as your license key.
 
Solution
Dear pl try to activate again and when it gives you options for activating better use activate on phone and tell them your issue. As a general note whenever you install windows. Install all drivers, all softwares/games etc. Fully update the Windows using Windows Update and then make a backup/image of the boot drive and keep it safe.

Whenever there is a need to reset windows, simply restore from that backup, in this way you'll get back all your settings/games/apps etc back in no time and no such issues.