Spybot running standalone under XP finds four virus: BurstMedia; DoubleClick; MexiaPlex; Right_Media. I get rid of the viruses. I rerun SpyBot, and the same four viruses are still there. I delete, reboot, and rerun SpyBot. Still there. I run Spybot standalone (from the bootable disk I purchased). Still there when I restart XP.
With nothing running, the CPU is about 20% busy. When I run FireFox, about 10% of my web browsers are redirected.
If I can find that XP diskette, I'm about to reformat everything.