Problems Related to Variant of the W32.Klez Worm Virus Infection
http://support.microsoft.com/default...&Product=winxp
SYMPTOMS
When you run Windows XP or Windows-based programs, you may experience one or more of the following symptoms:
Windows XP and Windows-based programs run very slowly.
Documents do not open properly, or when they open, they do not contain all the correct information.
You cannot start Windows Task Manager.
Free On-Line Virus Scanner
http://housecall.trendmicro.com