i am using window XP and after updating my windows, i alwz get a msg that my copy of window is not genuine. there is alwz a msg flashed on the lower right corner of screen that "i am a victim of software counterfeiting". please guide me on how to overcome this problem. recently i was attacked by rootkit virus, but thanks to u guys i got rid of that . i want to ask that which antivirus is best along with a suitable explorer.