I currently use Vexira, ditched F-prot becuase of a couple things I didn't like about it. I know in most test Vexira rates somewhere between 60 and 75 percent, which isn't too great becuase some free av's rate higher than that but so far it's been pretty good on my computer with no problems at all. It caught a backdoor program that dl'ed but couldn't delete it so I had to use Bitdefender free to move it to a special folder. I know Vexira is in development for better heuristics, how do you guys rate it? Should I stick with it or go with some like Nav corp?