Thread: Windows xp reboots continuously

I have a computer with windows xp professional, I have a problem, as the original serial s home, and no tengo home, I put a professional, and every time I am asked to activate, the problem is that I am asked to activate, say later, I get "closed session" and returns to the user and so continuously.' The only option is fail-safe mode but only that, the rest, although Safe mode with network connection, does the same, says activate windows, close the session and start again. I spent some antivirus failsafe, but nothing, This may be the solution, be somewhere where xp download a version of the original home to put the serial number on the sticker that is?