AntiVir XP Uninstallation

I downloaded AntiVir XP from Majorgeeks.com website. It was a great program. However, something happened and I lost some files I think. I have tried uninstalling it, it won't uninstall, and it won't reinstall so I can't do anything with it. I need help. I need someone to please tell me how to get it off of my computer completely, every single file and registry key. I can't put anything else on it, (well I can, but it doesn't work right). Please tell me how to remove it once you have already removed it in the control panel under add/remove programs. Thank you.

 

Try Your Uninstaller! 2006