Msevent.dll is a mass-mailing worm W32.Aprilcone.A@mm. Msevent.dll spreads by e-mail. Related files: %System%\syscon.exe %System%\mschk.dll %System%\Watcher.dll %System%\sysMon.dll %System%\syslog.dll %System%\atchk.dll %System%\sysmsg.dll %System%\chkrun.dll %System%\dskchk.dll %System%\msevent.dll %System%\ipchk.dll %System%\client.dll %System%\servr.dll %System%\netchk.dll %System%\mssys.dll Adds the value: "syscon" = "%System%\syscon.exe" "AppInit_DLLs" = "%System%\Watcher.dll" to the Windows startup registry keys.
More info: http://securityresponse.symantec.com/avc... Removal: Remove msevent.dll from Windows startup using antivirus (also check How To Remove section)Startup Optimizer.