More: This may be caused by a third-party program (adware, spyware,
parasite).
Get AdAware and SpyBot and run them both. Keep them up to date.
Dealing with Unwanted Spyware, Parasites, Toolbars and Search Engines http://mvps.org/winhelp2002/unwanted.htm
IMPORTANT:
Before trying to remove spyware, download a copy of LSPFIX from
the URL below - some malware may kill your internet connection when it is
removed, this program will enable you to regain your connection. http://www.cexx.org/lspfix.htm http://www.spychecker.com/program/winsockxpfix.html (if your OS is Win2k or
XP)