You will need to download ComboFix.exe. Download Combofix from any of the links below. You must rename it before saving it. Name it ComFx, and Save it to your desktop.You may have to download it on another computer and transfer it to yours if the malware is still blocking it.
http://download.bleepingcomputer.com/sUBs/ComboFix.exe
http://www.forospyware.com/sUBs/ComboFix.exe
* IMPORTANT !!! Save ComboFix.exe to your Desktop
It is important that it is saved and renamed following this process directly 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. More help on your specific AV here:
How To Temporarily Disable Your Anti-virus, Firewall And Anti-malware Programs
Double click on ComFx.exe & follow the prompts.
As part of it's process, ComboFix will check to see if the Microsoft Windows Recovery Console is installed.
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 ComboFix.txt in your reply.
Caution.....
Never use this program to remove files.Only use it with help from an experienced user.Wrongful use can damage your computer.