Allow only bitmapped wallpaper

Supported on: Windows Server 2003, Windows XP, and Windows 2000 only

Registry

HKCU Software\Microsoft\Windows\CurrentVersion\Policies\ActiveDesktop

Value name: NoHTMLWallPaper

Description

Permits only bitmap images for wallpaper. This setting limits the desktop background ("wallpaper") to bitmap (.bmp) files. If users select files with other image formats, such as JPEG, GIF, PNG, or HTML, through the Browse button on the Desktop tab, the wallpaper does not load. Files that are autoconverted to a .bmp format, such as JPEG, GIF, and PNG, can be set as Wallpaper by right-clicking the image and selecting "Set as Wallpaper". Also, see the "Desktop Wallpaper" and the "Prevent changing wallpaper" (in User Configuration\Administrative Templates\Control Panel\Display) settings.