in DESPERATE need of help

Alright- here is my problem. i seem to have some form of browser redirector that causes my browser (firefox) to be redirected and resized to ads. the blockers i have in place prevent any images from showing up, but i lose valuable work time when this happens.

what i have done to stop it:
i repeatedly run spybot: search and destroy, and it usually picks up several things
i run ad-aware, which clears MRU files (i think thats the name) and tracking cookies.
i have run CWShredder
i ran Avast antivirus in boot mode (it found and deleted a lot of things) and i ran it in windows
recently i used ad-aware and looked at the logfile and found a system file (command.exe) originating from an odd windows file. i looked around, and it redirected me to: command.adservs.com/uninstall.php
i figured this was a trick, so i didnt download it, but i left the room to make a call. my assistant did- he installed it and ran it, then restarted the computer. i deleted the file on startup, the one containg this.
in short, the browser redirection continues. is there any way to stop this?

EDIT: i forgot to mention: DSO exploit is usually present when i run spybot, it seems to come back.

 

well, i ran ad-aware in full mode (instead of smart) and i cleared about 200 criticals, but after i did it, firefox STILL is being redirected/opened at random times. i ran ALL the checks, but nothing is working. i am attaching my HJT logs with this, so please check those.

 

I did all the things on the list- i am saying the only thing new was more criticals from ad-aware. i did every step, in order, and STILL this keeps happening. please help.
(by the way: my priviledges to kill other users and system processes was revoked at about the same time)

 

oops- i guess i skipped over that one. i downloaded it (and will buy it soon, probably) and it seems to have worked. i had 2 problems that i noticed- in the temp folder, there were 2 things- eula.htm and thanks.exe. i had no idea what they were, but im guessing that they werent good.

Now: i still have another problem. at the same time that the popups/ browser redirectors started happening, i lost the access to end other users' programs. is there any way to fix this? i click on a process from one of the three other users on this computer, press delete, hit enter.... and: Access is denied. is there any cure for this?