I'm running BitDefender Internet Security 2012 under Windows 7 64-bit Home Premium.
Usually I don't closely watch the screen when I reboot my PC, but earlier today I did just that and noticed a plain-text message briefly appear just before the Windows login screen, which said "The antivirus solution installed on your computer is cleaning your system." It went by fairly quickly, but I believe that was the full text.
Is this normal?