Hmm, well I can't see anything else in the log that would indicate what the problem is, and the fact that you've already run those anti-spyware programs has left me even more stumped lol.
The only other possibility I can think of is that you've installed a program which comes bundled with "legitimate" spyware/adware/malware. Some companies let you use their software for free, providing that you agree to install their spyware. This would also explain why your anti-spyware programs didn't fix the problem - those programs don't remove the bundled, "legitimate" spyware because they know that removing it will corrupt the program that the spyware came bundled
with.
If you can come back with a list of programs that are currently installed it might help to shed some light on the subject. Off the top of my head, the following programs come bundled with spyware:
DivX Codec - I've seen the Gator spyware included in this package in the past.
Messenger Plus! - An add-on for MSN Messenger. It comes with an
optional sponsor program (i.e. spyware) that you can opt out of during the installation.
Some P2P/filesharing programs like
eDonkey,
Usenet, etc. have sponsor programs bundled with them, too.
If you can get us a list of programs to check out, or if you want to google each one yourself and see what is said about them, it would eliminate the possibility if nothing else
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Cheers mate! hehe 
