Posted 21 March 2011 - 11:54 AM
Windows XP virus symptoms: browser redirect, Windows update blocked, can't restore system to earlier date, svchost.exe using a lot of memory.
Googling the symptoms suggests the Downadup worm. However, Symantec's Downadup removal tool can't find it. Norton Security Suite and Malwarebytes' Anti-Malware also find nothing.