Please post a HijackThis log here so we can see what programs are running in the background and what "nasties" are present. We can do a much better job of helping you from that point on.
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If you haven't yet installed
Ad-Aware SE Personal 1.06
Spybot - Search & Destroy 1.4
go to the "spyware tools" section at
www.majorgeeks.com and install them. After they've been installed, run their update function and install all updates that are available for them. Don't run a scan with them until we see your HijackThis log first.
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