How to Allow People to Change Their Time Using a Group Policy in Windows XP
Windows XP is a multi-user operating system with support for different types of user accounts. Limited user accounts don't have permission to make changes to the system, such as changing the system time and installing software. By default, only administrators and power users can change the time on Windows XP. If you want to let limited user accounts update the system time, you can change this security setting in the group policy editor. Because it's intended for system administrators, the group policy editor isn't available on Windows XP Home.
Click "Start" and click "Run."
Type "Gpedit.msc" into the Run dialog and press "Enter."
Navigate to the "Computer Configuration\Windows Settings\Security Settings\Local Policies\User Rights Assignment" folder in the group policy editor window's left pane.
Double-click the "Change the System Time" setting on the right side of the window.
Click the "Add User or Group" button.
Type "Everyone" in the "Enter the Object Names to Select" box and click "Check Names." If you want to give only a specific user account permission to change the time, type that user account's name instead of "Everyone."
Click "OK" twice.