It's a Zlob infection. Zlob Trojans masquerade as video or audio codecs required to view a movie or listen to a audio file. In reality, though, these Trojans instead install VirusProtectPro as well as other malware on to your computer without permission.
When the Zlob Trojan is launched on your computer, it will automatically download and install VirusProtect Pro. When VirusProtectPro has finished downloading and is installed, it will automatically launch and start a scan of your computer. This scan will provide exaggerated or false results and state that the only way to clean these "infections" is to purchase the commercial version of the software. They do this purely as a way to scare you into purchasing the full commercial version of their software. Needless to say, you should not purchase VirusProtectPro.
Another byproduct of the Zlob Trojans are that you will see fake security alerts in your Windows taskbar saying there is a problem with your computer or that you are infected. Once again these alerts are false and are only being used as a scare tactic. When you click on the alert, it will automatically launch VirusProtectPro and do a scan.
Removal tools here
http://www.bleepingcomputer.com/forums/topic98219.html
