What should I do if the WinXp system cannot open the control panel?

This problem occurs, mainly because the "Access Control Panel" function is enabled in Group Policy, we can open the control panel by simply closing it.
Method 1:
1. Open the "Start" menu in XP and select the "Run" option, or use the shortcut "Win+R" to bring up the Run window and enter "ldped; Msc”, press the Enter key or OK.

2. After opening the Group Policy window, expand the “User Configuration” >>“Administrative Templates>>“Control Panel” option in the list on the right. Double click to open “ Control Panel & rdquo; (as shown below).

3, then double-click to open “ prohibit access & lsquo; control panel & rsquo; & rdquo; options (as shown below).

4. After opening the access control panel property window, select the status of “Unconfigured” in the Settings tab, and finally click OK.

Method 2:
If users think that Group Policy settings will be more troublesome, you can look at setting them with commands.
Use the first step of Method 1 to open the "Run" window and enter the "cmd" command. Press OK or Enter to open the Command Prompt window and enter the following two commands in the window. And press OK:

for %i in (%windir%/system32/*.dll) do regsvr32.exe /s %i, press the keyboard Enter key.
for %i in (%windir%/system32/*.ocx) do regsvr32.exe /s %i, press the keyboard Enter key.