The Microsoft detected my OS on my older rig that it is illegal but I still can use the pc, there is a notification message on the wallpaper that I cannot remove it says I was a victim of counterfeiting , is re-installation of XP will do? It is ok if I cannot use it anymore it's just my testing rig.
If I'm reading it right it seem to be that you want to know if reinstalling it will make it not a counterfeit copy ,my answer is NO! it will always be a counterfeit copy . or if reinstalling it will get rid of the nag screen then my answer is yes