Not sure by your post if this is XP or Vista. Besides the specific
edition of Windows installed, what Service Packs have been applied so far ?
Also, could you supply some information on what your firewall is, anti-virus,
other R-TP programs, e.g. Spybot Search & Destroy (reduced functionality
called "TeaTimer") Avira (From version 9) (Included in antivirus package),
Ad-Aware, etc?
If you continue to have trouble, you can obtain free
malware-related support from Microsoft Product Support Services by calling
+1 (866) PC-SAFETY (+1 (866) 727-2338) in the U.S. and Canada, or at your
local international subsidiary.
<http://support.microsoft.com/common/international.aspx>