I am using Threatfire antivirus in my system. I switched to this antivirus because my old antivirus (Norton) makes my system very slow. I am using Windows xp. This is a old system with 1GB ram and a small 512mb gpu. I am not able to understand that even after installing this my computer is working very slowly. It take lots of time to boot up and sometime it freezes. Does is it because of Threatfire.