Windows XP uses Group Policy to harden system security

        Starting Group Policy
When you start Group Policy, you can start Group Policy by clicking the Start button, selecting the Run command, and entering the gpedit.msc command in the Run text box.
Don't change my wallpapers
We often set our favorite pictures as desktop wallpapers, but sometimes the set wallpapers will be modified by others. What do you need to do to prevent others from modifying their wallpaper? In fact, you can use Group Policy to achieve it. There are related options in the group policy that prohibit the modification of the wallpaper. You only need to make the corresponding settings.
In Group Policy, an "Active Desktop Wallpaper" policy is provided, which allows users to set wallpapers on the desktop and prevent users from changing the wallpaper and its appearance.
The setting method is as follows: In the Local Computer Policy on the left side of the Group Policy window, expand User Configuration→Management Templates→Desktop→Active Desktop (Figure 1). Then double-click the "Active Desktop Wallpaper" policy item in the right window, a dialog box pops up, first click the "Enabled" single option, then the following text box has been activated, in which the wallpaper is typed in the "Wallpaper Name" item. The folder and name of the image file (Figure 2). And in the "Wallpaper Style" below, specify whether the wallpaper is centered, tiled or stretched, etc. Here we can select according to the needs, then click the "OK" button, and others will never again Change the wallpaper on your desktop.

Figure 1

Figure 2
In this strategy, the system provides a UNC path, through which we can set pictures on the network or pictures from other computers on the LAN to make wallpapers. If you set the image on other computers, we can enter the //Server/l.jpg format. After setting this policy, users cannot change the wallpaper through System Properties.
Hide "Internet Options"
If you have a computer with someone else, you have the necessary settings for IE, such as security level, control enable settings, and so on. After these settings, you don't want others to make changes. In this case, we can use the Group Policy to block the items in the Internet options and enable them later.