I have a new sony vaio laptop -- about three months old -- with windows XP. In the past few weeks I discovered that I no longer have any Power Scheme Options -- they are greyed out and are not available. I go to power schemes via the Control Panel, and then click on PowerOptions. The Power Scheme tab is the only tab that is no longer available. I do weekly windows updates so I can't figure how to restore these options.
Thanks very much.