The other day I was called to the desk to fix someone's browser hijack. Ran Adaware and spybot and still it was hijacked. Looked through the processes in task manager and control panel add/remove programs.; I deleted everything suspicious. Still it was hijacked. If you haven't tried super antispyware yet, do try it. It was the winner. It found and destroyed the spyware. Get it at http://www.superantispyware.com.
Just a note on Lavasoft Ad aware 2008. It does seem to be considerable faster and better than 2007. Too bad their support is practically non-existent. If you are going to do world-wide business, your support should be world-wide. They have NO telephone sales reps.