This is the horrible piece of AV I have ever tested.Sure,it is light on System Resources and does not need updates but fails to detect any type of malware(except tracking cookies).Firstly.I scanned my computer with this only to get a report"Congratulations,your PC is clean".Then I ran a full scan with AVG to only to detect over 25 infections.It is free but if you want good protection,better use Drive Sentry or PrevX.Compared to PrevX,Panda has a huge download size.