That is what I am leaning towards as well. Let's try removing it and downloading it again
This will clear away any of the files and folders that were created by ComboFix.
Go to :
Start > Run then copy and paste the following highlighted text below and click OK.
When ComboFix receives such an instruction, it will do the following:
a) Deletes the following files/folders:
* ComboFix.exe
* %system%\swxcacls.exe
* %system%\swsc.exe
* %system%\VFind.exe
* %system%\moveex.exe
* %system%\swreg.exe
* %systemroot%\catchme.exe
* \ComboFix
* \Qoobox
* \VundoFix Backups
* \Deckard
* \_OTMoveIt
* %systemroot%\erdnt\subs
b) Resets the clock settings.
c) Hides file extensions
d) Hides System/Hidden files
e) Clears System Restore cache and create new Restore point
==============================================
Next, lets download ComboFix.exe. This will give me a better view to the files running, those that are hidden, and also those in the registry..Please download from one of these webpages .
http://download.bleepingcomputer.com/sUBs/ComboFix.exe
http://www.forospyware.com/sUBs/ComboFix.exe
http://subs.geekstogo.com/ComboFix.exe
* IMPORTANT !!! Save ComboFix.exe to your Desktop
Disable your AntiVirus and AntiSpyware applications, usually via a right-click on the System Tray icon. They may otherwise interfere with our tools.
Double-click on ComboFix.exe & follow the prompts.
As part of it's process, ComboFix will check to see if the Microsoft Windows Recovery Console is installed. With malware infections being as they are today, it's strongly recommended to have this pre-installed on your machine before doing any malware removal. It will allow you to boot up into a special recovery/repair mode that will allow us to more easily help you should your computer have a problem after an attempted removal of malware.Recovery Console can be installed from your disc if you have Vista if you wish.
Follow the prompts to allow ComboFix to download and install the Microsoft Windows Recovery Console, and when prompted, agree to the End-User License Agreement to install the Microsoft Windows Recovery Console.
**Please note: If the Microsoft Windows Recovery Console is already installed, ComboFix will continue it's malware removal procedures.

Once the Microsoft Windows Recovery Console is installed using ComboFix, you should see the following message:

Click on Yes to continue scanning for malware.
When finished, it shall produce a log for you. Please include the log in your reply.