Hello,
I am using Windows 7 64bit system, and BitDefender Internet Security 2012. I cannot turn on on-access scan. When I go to Antivirus -> Shield -> On-access scanning, no matter what my setting is (aggressive, normal, or permissive), it always says "do not scan files". When I try to change it customarily, the settings I changed will not save. So currently, my custom option is just "scan IM traffic", and "scan HTTP traffic". I confirmed that the on-access scanning definitely don't work by going to EICAR and downloading two of their test files. I opened both with no problem.
What should I do?