As.exe is a Backdoor W32.Allim.B. As.exe spreads through America Online Instant Messenger (AIM). As.exe tries to terminate antiviral programs installed on a user computer. Related files: %ProgramFiles%\aolx\as.exe %ProgramFiles%\aolx\proto.exe %System%\procmsg.exe Adds the value: "Windows Generic Proc" = "procmsg.exe" to the Windows startup registry keys. More info: http://securityresponse.symantec.com/avc... Removal: Kill as.exe process and remove as.exe from Windows startup using antivirus (also check How To Remove section)Startup Optimizer.