bingo, you must be running combofix incorrectly. Look at this link; post #107 to see what a combofix log will look like
http://forum.networktechs.com/showth...t=1231&page=11
Follow these instructions exactly...you must be clicking the mouse during the scan because it seems to be stalling and not completing the scan.
Delete the last one you downloaded and click on the link here;
Download
ComboFix.exe and save it to your DeskTop.
-- DoubleClick
combofix.exe & follow the prompts.
When it's finished, it will produce a log of what it found. Please post that log for us.
Do not mouseclick combofix's window whilst it's running as it may cause it to stall...