Those of you who may develop an interest in malware - maybe because it has cost you money :) - can get some real in depth and up to the minute information about the latest malwares that are out there from this site Threatfire Blog . You may also be interested in the product.
As I said before we aren't going to be shy of giving an opinion even where it may be 'politically' incorrect. This is what we have found with Threatfire in usage, most of the time it is great.
The rest of the time well it isn't. What occasionally happens is the PC will start to lock up at various times and usually there is a pattern like right after the desktop loads or right after you open a specific program. Now I have great respect for the makers of Threatfire and the team involved but if you have these problems on a PC with TF installed - just uninstall it and it will fix it. It may not even be TF that is really the problem but something else which is interfering with it but when your PC doesn't work you just want to get on - there are lots of security solutions out there.
I like Threatfire and I recommend you give it a try, maybe nothing on your PC will interfere with it in a bad way and in that case you get some good extra protection for free. As you now know that the most likely cause of a hanging PC with TF is the TF installation not playing nice with something else you are using you can always uninstall if you find that you get that symptom so there is nothing to lose.