To remove OEM wallpaper

1. Open Regedit on the server.

2. Go to \HKEY_USERS\.DEFAULT\Control Panel\Desktop.

3. Look for the Wallpaper value in the right-hand pane. It will probably point to C:\WINDOWS\system32\DELLWALL.BMP (in the case of a Dell).

4. Double-click on the Wallpaper value.

5. Delete the contents and click OK.

6. Close Regedit.

7. Delete related file shown as registry value in step 3