cannot run anti-virus and malware removal software

Hello
yesterday i found out i cannot start AVG. I click it and nothing happens. When i click spybot it ask permission to run but then nothing happens.

I ran the guide on this forum (""Windows XP Malware Removal/Cleaning Procedure"".
Followed the procedure and downloaded Roguekiller, Mam, tdsskiller, hitman pro and mgtools. The results after installing the programms:
* Roguekiller: could not start the program (clicked it, asks permission, nothing happens)
* MAM:could not start the program (clicked it, asks permission, nothing happens)
* tdsskiller: could not start the program (clicked it, asks permission, nothing happens)
* hitman: The programm ran, found a bunch of malware. Did not remove it (as mentioned in the guide). Attached the log
* mgtools: It starst running in dos and then i get over and over a request to give permission in windows. I click yes and get the same request again. Over and over, but the programm does not run.

Attached are the log of hitman.

Please help me, don''t know what to do.

thnx
Ron

 

Thank you Kestrel for your reply and that you're taking the time to help me. Appreciate it.

Having said that this was bad news obviously.

But something unexpected (for me) happened.
Since you said i had to re-install my OS, basically losing everything i had i figured it wouldn't kill me to at least try and run Hitman again and actually have Hitman take action its findings (instead of just making a log).

So i did just that (so for clarity i did not do a re-install of my os), and Hitman found again a bunch of itemns and those were removed or put in quarantine and the computer restarted.

After the computer restarted i was able to restart AVG, spybot etc.
So i ran those programms and some of the other programs mentioned in the guide. My virusprogramms are up and running, and everything appears to be normal again.

So now my question is: How can i check if indeed everything is cured? Or am i just getting my hopes up?

Thanks again
Ron