Hello, i need some help with this. I have some spyware or a virus, but every scan i do comes up nothing. Whatever i did find, i deleted but my computer is running so slow and keeps rebooting. The computer restarts itself every 20 mins or so, and takes 12 mins to reboot. I had popups at start up and even when idle asking me to download Ultimate Defender. Ive been trying to remove Ultimate defender for a while now using the steps listed in forums. When it starts up now, it gives me an error message "The system has recovered from a serious error." When i am searching for things on google, and click the link provided, it redirects me to a diffrent site. I can now only access the net through pages in my favorites. Can someone PLEASE help me? I am running Xp sp2 Is there any other information than can be helpful in solving this Problem? Here are some of the scans i have tryed, Ad-Aware SE Professional, Spybot - Search & Destroy, AVG 7.5, AVG Anti-Spyware, Spyware Doctor, CCleaner, avast! Antivirus, Malwarebytes' Anti-Malware, SmitfraudFix.exe, SUPERAntiSpyware Free Edition.