In order to turn off the AntiVir splash screen, please follow these steps:
Start the Windows registry editor (Start - Run - regedit)
Under HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\Curr entVersion\RunHKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\ Windows\CurrentVersion\Run (Windows Vista/7) click on avgnt (Windows 2000/XP) or
Add the parameter /nosplash (Windows 2000/XP) or -nosplash (Windows Vista/ 7) to this entry
The splashscreen will no longer appear during startup and AntiVir will start in the background