|Your problem is often called|
XP’s Power Options Properties are grayed out
You often MUST Restart Windows after editing the Registry.
If the problem has NOT gone away after you have Restarted Windows
Are you SURE the *.reg file was successfully inserted into the Registry ?
It says on the same web page referrred to above...
Some people seem to have some problem when they doubleclick the reg-file. Here are the instructions when doubleclicking doesn’t work:
1.Save the registry file to somewhere on your computer
2.Open the Registry (start -> run -> “regedit” -> OK)
3.Click File -> Import
4.Navigate to the saved file and click “Open”
5.Confirm the Import
Start > Run > type: powercfg /RestoreDefaultPolicies (press Enter)
a space between powercfg and /Restore....