Antivirus 2009 (or 2008, or Antivirus XP2009 or dozens of other names – there are many clones of this rogue software) is a piece of malware that infects your computer and constantly pops up notices that you have an infection and you have to buy or update Antivirus 2009. This is a scam to trick you into paying $30 for some useless software. The malware installed when you downloaded something from the web, sometimes masquerading as a video codec or other useful software. It is persistent, and infects a number of Windows files.

It is too clever to just delete it or add/remove it. It may even block your Task Manager and block Internet access to antivirus sites.

First download the following (if the virus is blocking your internet, you may have to download these on another machine and burn to CD or copy to a USB memory stick)

Malwarebytes: http://www.malwarebytes.org/mbam.php

Superantispyware: http://www.superantispyware.com/superantispywarefreevspro.html

CCleaner (cleans out caches) http://www.ccleaner.com

Avast! 4 Home: http://www.avast.com/eng/download-avast-home.html

Now, start the machine in Safe Mode (hit the F8 function key as the machine boots up, and choose Safe mode)

Turn off System Restore on your machine, but only until you get this fixed – many of these trojans get copied into the System Restore files, which anti-virus programs aren’t allowed to touch and the viruse could reinstall themselves from there. My Computer > Properties > System Restore.

Then run CCleaner (it’ll make scanning faster because it will delete a bunch of temp files and save you from having to scan those.)

Then run Malwarebytes, and clean everything it says.

Then in stall and run Avast – tell Avast to do a boot-scan – click on "schedule boot-scan" – and restart the computer

Let it start and do the Avast boot scan

Then install and run Superantispyware

Then turn System Restore back on.

Now install the antivirus program and antispyware program of your choice to do continuous scanning, and make sure you keep it up to date.

Always keep your Windows, web browser and Java software up to date – frequent patches are released to plug security holes.
http://www.pcworld.com/article/149298/10_quick_fixes_for_the_worst_security_nightmares.html

Try this
http://greatis.com/security/reanimator.html
it’s free
It scans the memory for viruses and you have to tell it if it’s a virus or not.

Yes, you are correct about it being a fake program. if you need to find out more about it or even remove it for free you and read http://www.spyware-techie.com/antivirus-trigger-removal-guide-and-information/. It gives you the full scoope and removal guide for it.