if ad-aware isn't working you may need to go up to specialized tools.
I recommend this if you don't know what you are up against - http://free.antivirus.com/hijackthis/
and finding a forum where people can actually tell you exactly what you need to do.
I recommend this - http://forums.malwarebytes.org/index.php?showforum=7
if you got Cool Web Search (which is by far one of the hardest things to remove) then I suggest this - http://free.antivirus.com/cwshredder/
Also, this page might be of some help - http://free.antivirus.com/clean-up-tools/
edit: it's funny that all my favorite tools got bought out by trend micro 








