It can seem just about impossible to remove Antivirus 2009 on your own. It's a nasty pest whose job is to stay on your computer, by any means necessary, and badger you into buying its "upgraded" version.
If you want to try and delete it yourself, you're playing walk-on-eggshells with your DLL files and registry keys. And even if you get rid of its malicious files without deleting anything important, it can replicate from other places it may be hiding.
What's worse, it can act as a portal for other kinds of spyware and malware. And it's not technically a virus--it is a malicious codex--so many antivirus programs tend to miss it.
Spyzooka is a security software that can take care of this. It offers a 100% money-back guarantee if it can't completely clean your computer. I don't know of any other program that does that!