My mother-in-law somehow has messed up her windows and constantly gets the not genuine windows message in the lower corner of the screen. She has an HP and windows 7. She also has the product key. Do I tap F8 at boot-up to go into safe mode and reapply windows? I need a step-by-step-how-to-apply course. I think I just follow the questions...right? Help. I don't remember it being so hard to put the key code in for a repair back in the days of win xp, I hope 7 is as easy.