Installed on a Pentium D 3.0 Ghz with 320 hard drive. Everything had been peachy keen since I got the box a month ago. I installed the Norton suite amd turn on Go Back and mysteriously my hard drive dissapeared when I tried to start up the next time. Poof. Gone. I had to reformat and reinstall windows xp Media edition. At the time I didn't attribute it to this virus packaged as a helpful program. So I reinstall everything, for the past week, preformance has been degrading. Slower and slower. I am currently laughing bitterly at the box it is on because on boot at 4:20 pm eastern, Norton went all crazy and decided to GoBack! It is now 6:50 pm. I took a nap. The damn things is at 76% and has been there since I woke up. I am questioning if I should just turn the box off now. Possibly the worst software I have ever intentionally installed.