Threatfire antivirus?

My daughter has been having probelm with her computer crashing, and said she had tried a new antivirus program called Threatfire.

I downloaded it and tried it out -- installed it on my laptop -- and it slowed my computer down to a crawl, or actually brought it to a halt. The only way to get it moving again was actually to switch it off. It looks as though this program is not so much antivirus, but rather itself a virus. Has anyone used it successfully? Is there a trick to installing it, to get it to work?

I think I'm going to do a "system restore".