My screensaver tab is missing from control panel display. I found the fix
pasted below, and the data value is indeed "1", but when I change it to zero,
I get the following error message:
"Cannot edit NoDispScrSavPg: Error writing the new value's contents."
Can anyone help restore my screensaver tab?

The fix I tried:

Start > Run > Regedit
>
> Navigate to
>
> HKEY_CURRENT_USER\Software\Microsoft\Windows\Curre ntVersion\Policies\System
>
> If there is a DWoRD Value called "NoDispScrSavPage" with a data value of 1
> this will disable the screen saver tab. Change the value to 0 to
> see the tab again.