My son was unknowingly without virus protection on his laptop, so we quickly downloaded Norton Internet Security and ran a complete system scan in safe mode. Everything cleaned up fine except backdoor.tidserv, which the scan message said needed to be removed manually. There is plenty of info on removing the virus manually, but my question is more basic. Why does is need to be removed manually? We just got the latest Norton Internet Security, and Live Update has been run, so shouldn't it have the latest virus definitions?
Something occurred to while I was writing the above. I installed Norton Internet Security in safe mode. When I ran the full system scan in safe mode, live update may not yet have been run. Do I need to go back into safe mode and run a full system scan again?