Activation wont work

[WhoCanStopMe]

Ive been using windows 8.1 since it came out with it activated and all of the sudden when i install a driver for something it deactivates and my product key wont work. Help please!

 

[FALC0N]

More information

 

[bignastyid]

If it not accepting your legal key you need to contact microsofts licensing dept.