I had random programs beinging deleted every once in a while on my computer so i ran malware bytes and it said 11,000 files were infected with a trojan downloader.er!!! I have norton internet security and it found nothing. Anyway i thought it would fix the problems but the files that were infected were all random. Obviously the virus was there for a long itme and got into a bunch of stuff. But malwarebytes deleted files that are needed to run windows and other programs like my internet browser, itunes, steam etc. Is there a way to get rid of the virus without deleting the files? Please help because if they have to be deleted im going to have to have to restore everything to get windows working.