Want to prevent someone from changing desktop wallpaper ? Follow these steps which are very useful to customize windows 7 interface settings like locking desktop wallpaper so your friends, employees etc can’t change the desktop background, wallpaper without your permission.
Step 1 : Go to Start > Run or press + R and type in gpedit.msc (This file is located at C:WindowsSystem32gpedit.msc)
This will open the Local Group Policy Editor in Windows 7.
Step 2 : From the left panel, click on to expand User Configuration > Administrative Templates > Control Panel > Personalization
Step 3 : Right click on Prevent changing desktop background and click Edit.
Step 4 : On this window (see below) select Enabled to To Prevent Changing Desktop Background.
Click OK and restart PC to make it work fully. To disable this feature follow the same steps and select "Disabled" in Step 4.
Now the Desktop Wallpaper Change option will be greyed out to prevent any further wallpaper change.
Note : It will also disallow users from right clicking on Images and setting them as Desktop Background from context menu. The wallpaper won’t be changed.
There are similar settings for screensaver, power scheme etc.