If it can't be done via the GUI, it can be done from the command prompt. Just use the commands date and time to change them as you want. I don't think that's easily deactivated.
It could well be that "I NEED to disable" and "I NEED to keep using XP Home" can't be combined. Then at least one of these requirements can't be fulfilled.
I need to disable in a secured way the WIndows Time and Date settings. I
have WinXP Home Ed SP3. That is, a way to prevent a normal user to
change the time and date of the system (make it password protected or
have it very well hidden, for example).
I could hide the clock from the task bar but this is too trivial. I
cannot use the Local Security Policy feature because it is not present
in the Home edition.
By "secured way", I mean a method that cannot be easily bypassed by a 13 years old child.
Any other ideas? Thank you!