HijackThis! (freeware) is useful for finding the home page hijacks. It's probably not as useful or as wide ranging as some other more recent anti-malware utils - but the owner of the util only intended it to do things that other ones at the time couldn't do. i use it form time to time to show up if anything has not been picked up by the others. They don't interact, so if one of the other utils has 'ignored' something - this one will pop it up for you to see.

* HijackThis v1.97 *
Written by Merijn - merijn@spywareinfo.com
http://www.spywareinfo.com/~merijn/files/hijackthis.zip
http://www.spywareinfo.com/~merijn/index.html