My computer was being attacked by trojan after tojan and norton was blocking them and i found the file that i had just got that caused it and deleted it but i was still being spammed by trojans so i shut the computer down and when it started up norton came up saying that all my antivirus was turned off and i tried to run a scan but it said it coudnt find anyupdates that would allow it to scan so it didnt scan. and i restarted again and now norton doesnt even turn on at all. this is so frustrating. plz help=[