A. Active Desktop lets you easily use most formats for the background picture. When you choose a picture that isn't a bitmap, the system asks whether you want to enable Active Desktop and use the image you selected. You can use Group Policy to restrict users to bitmapped images.
- Start the Microsoft Management Console (MMC) Group Policy Editor (GPE) snap-in, and load the Group Policy Object (GPO) you want.
- Expand User Configuration, Administrative Templates, Desktop, Active Directory.
- Double-click Allow only bitmapped wallpaper.
- Select Enabled and click OK.
- Close GPE.
You can also edit the registry to restrict users to bitmapped images.
- Start regedit on the machine where you want to restrict users to bitmapped images.
- Go to the HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\ActiveDesktop registry subkey.
- From the Edit menu, select New, DWORD Value.
- Enter the name NoHTMLWallPaper and press Enter.
- Double-click NoHTMLWallPaper, enter 1 for the Value data, and click OK.
- Close the registry editor.