Disable the nag screen

Windows 2000:

1. Click Start, and then click Run.
2. In the Open box, type gpedit.msc, and then click OK.
3. Expand User Configuration, expand Administrative Templates, and then expand System.
4. In the right pane, double-click Don't run specified Windows applications.
5. Click Enabled, and then click Show.
6. Click Add, and then type the executable file name of the program that you want to restrict users from running. (For example, type avnotify.exe)
7. Click OK, click OK, and then click OK (NOTE: If domain-level policy settings are defined, they may override this local policy setting.)
8. Quit Group Policy Object Editor.
9. Restart the computer.

Windows XP Home and Pro:

1. Boot into Safe Mode (tap F8 repeatedly after you restart the computer)
2. Log in using the Administrator account
3. Go to C:\Program Files\(Avira)\AntiVir PersonalEdition Classic\avnotify.exe
4. Right-click avnotify.exe-> properties-> security-> advanced
5. Under the Permissions folder you will see all of the users. Start with the first user….
6. Edit-> Traverse Folder / Execute File-> deny-> ok
7. Now perform step 6 for all of the other users-> apply-> yes/ok-> close all open windows
8. Reboot the computer into Normal Mode (start-> shutdown-> restart)

Windows XP Pro & Vista Business/Ultimate

1. Start-> Control Panel
2. Administrative tools-> Local security policy
3. Click on Software Restriction Policy-> Action (at the top)-> create new restriction policies
4. Right-click additional rules (on the right side)-> new path rule
5. Click Browse and navigate to C:\Program Files\(Avira)\AntiVir PersonalEdition Classic\ and double-click avnotify.exe-> set the security level to Disallowed-> apply-> ok

Windows Vista Home Premium

1. Go to C:\Program Files\(Avira)\AntiVir PersonalEdition Classic\avnotify.exe
2. Right-click avnotify.exe-> properties-> security->
3. Under the group or username SYSTEM click edit
4. Put a checkmark under the DENY column for "read and execute"

Disable the splash screen (All OS'es)

Make this registry change adding the /nosplash to the end:

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
"avgnt"="C:\Program Files\(Avira)\AntiVir PersonalEdition Classic\avgnt.exe\" /min /nosplash

Notes:

* Avira modified the default installation path during the Q3 2007 update therefore I’ve added (Avira) where it is applicable
* Sub Classic for Premium if needed, and if you’re using the Premium Security Suite the default path is C:\Program Files\Avira\Premium Security Suite\