mooseman
the only guaranteed way then is to completely wipe the computer, by formattiing it and reinstalling everything
sometimes we have managed to removed the majority of it with various tools adn if you want to try then post a Hijackthis log. BUT be warned it is a long and difficult fix and is NOT guaranteed to work
go to
here and download 'Hijack This!' double click on the file and it will install to C:\program files\hijackthis and create an entry in the start menu and an optional shortcut on desktop.
Click on the entry in start menu or on the desktop to run HijackThis
Click the "Scan" button, when the scan is finished the scan button will become "Save Log" click that and save the log.
Go to where you saved the log and click on "Edit > Select All" then click on "Edit > Copy" then Paste the log back here in a reply.
It will possibly show issues deserving our attention, but most of what it lists will be harmless or even required,
so
do NOT fix anything yet.
Someone here will be happy to help you analyze the results.