If you're using IE, have you tried cleaning out your cookies?
Tools / Internet Options / General
Click Delete Cookies
If that doesn't work, try using these basic security programs?
(They're all free.)aČ freeewido security suiteAd-AwareSpybot S&D
These 2, will help prevent spyware/malware from being installed in the first place:SpywareblasterSpywareGuard
Download them, update
them, and then run them.
These programs, updated
and used regularly
, will do a lot to keep your computer clean of spyware, trojans, keyloggers, browser hijackers, etc...
When installing ewido security suite
, under Additional Options
uncheck:Install background guardInstall scan via context menuImportant:Please
read this tutorial
on Spybot S&D before using it. Spybot can do SERIOUS
damage, if not used properly.
Other useful Tutorials:Using Ad-Aware SEUsing SpywareBlasterUsing SpywareGuardUsing Ewido