I recently had my system crash, due to a bug, my virus protection wasnt picking up. After $200 dollars, hours of reading and help from you great blokes here in the 'forums'' I finally traced it to the system restore. Problem finally solved. I guess, its a question of security, to run an additional scan just to make sure nothing is lurking. Providing the program is good, I cant see it would hurt. Run a mcaffee stinger can never hurt, visit http://vil.nai.com/VIL/stinger/ for the latest version and run it on your machine. It is an standalone executable so you can take it anywhere on a usb stick