ALL MALWARE/SPYWARE Checking Software is killed

Please help..

I have been very careful about downloading anything onto my pc, but yesterday is seemed to get something from a dodgy website I was directed to.

I found three files a.exe, b.exe, c.exe, which I managed to delete. Since then any MalWare/Spyware software I try and run just crashes halfway through the check.

Spybot was the first, as soon as the Scan starts it crashes. Then when I try and launch it again the Windows Error "Windows cannot access the specified device, path, or file. You may not have the appropriate permissions to access the item."

I also checked the Task Manager and found MSB.EXE running. I have also moved that file to the Recycle Bin.

I have tried most of the software suggested in the Sticky post, and most of them crash before they output a log.
I did manage to get a log file from RootkitBuster.

Any help would be greatly apperciated.

Thanks

P.S. I have turned off User Accounts as well. Sometimes when I turn the computer on, the graphics are blank, the background is black, there are no icons, just the "square" where the icon should be. But the computer functions correctly (relatively)

 

Further Update :

I have tried all the other ideas, such as changing the name of the exe, renaming the malware folder etc.
I did manage to get HJT to work, but again it crashes before it outputs any logs. Once HJT has run once it somes up with the same error as above. I have managed a trick to try and run it multiple times, which is to run it from a USB drive, but still crashes before a log can be output.

I have also found that sometimes the explorer does not start, so there is just a blank screen, but I can launch Task Manager, and log off.

 

Slowly but surely getting some logs.

I have put the log files below. The SmallTroj.Tube file has been deleted, and then the next scan ran successfully. I have to run this app from the USB Drive, and the icons or background are still not visible.

 

Sorry about this, but seem to be making progress and am getting more logs.. finally got ComboFix to run, and that has given me icons and background back. I have got a HJT log as well now.

Still will not let me run any other SpyWare programs, such as AVG, Norman, Spybot.

Any help is greatly apperciated.

Thanks