Removing StubbornThreafire

I am having a real problem trying to get rid of Threatfire 3. I use Avast as my antivirus and when I installed Threatfire the Security Center says Threatfire is my AntiVius. I have tried uninstalling this program without any success. Please how in the heck do I get rid of this pesty program. Any help would be appreciated. Thanks in advance!!:mad

 

I tried used the Add/Remove to uninstall the program. I am using Xp Pro. the Security Center says I have two AntiViuses running but I already unistalled Threatfire.

 

I tried using RegSeeker to get rid of the registry entry but Security Center says it is still there?? Strange program

 

Please let me make myself clear. I uninstalled Threatfire through the Add/Remove. I restarted the computer and then run Ccleaner. I restarted again. Ok I went to the Security Center to see if Threatfire was gone but it says I have 2 anitviruses running. Can I have both Avast & Threatfire running at the same time?? If not I just want to know how to go about getting totally rid of the Threatfire.

 

Thank you very much for your quick response. I think then I will just run Threatfire along with my Avast. I also have Pc Tools Firewall Plus