My IE got hijacked by a conglomeration of adware centered
around "Bargain Buddy" ( It has a little dog icon. )
I ran Spysweeper ( recommended by my ISP ) and it finds
and removes things, but if I run IE again they "come back".
I'm subsisting on Netscape Communicator 4.79 ( which I
prefer ) and Netscape 7.02 ( since Netscape 4 is
"broken". )
I have found that Bargain Buddy requires the 1-2-3 punch of "Spybot Search and Destroy," "Ad-Aware" and "AVG Antivirus."
But it can be removed permanently.
The problem you're having is that Bargain Buddy hides a copy of itself in the "prefetch" directory and repropogates/reinstalls after removal.
Download and install Javacool Software's Spywareblaster. That should keep em from coming back. And go to Eric L. Howes' website and download and lock down Internet Explorer with IE Spy-Ad. Both measures should keep your computer virtually 100% parasite-free. And they're both FREE.