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try to look in your device manager-&gt;system devices<br />
can you find ACPI there ? I think that related with power management.
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try to look in your device manager->system devices
can you find ACPI there ? I think that related with power management.

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It could also be because your using a laptop and some of these other features are only available for home desktop computers..Were they available before? If so can you remember what you may have done since?<br />
Could try..<br />
&nbsp;sfc /scannow &nbsp; &nbsp; &nbsp;<br />
you may need your xp cd, not sure if this is an option that can be added from your xpcd as well.<br />
Merete 
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It could also be because your using a laptop and some of these other features are only available for home desktop computers..Were they available before? If so can you remember what you may have done since?
Could try..
 sfc /scannow      
you may need your xp cd, not sure if this is an option that can be added from your xpcd as well.
Merete

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I have a new sony vaio laptop -- about three months old -- with windows XP. &nbsp;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. &nbsp;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.<br />
<br />
Thanks very much.
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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.

Power Schemes not available

Microsoft Windows XP is the sixth release of the NT series of operating systems, and was the first to be marketed in a variety of editions: XP Home and XP Professional, designed for business and power users. The advanced features in XP Professional are generally disabled in Home Edition, but are there and can be activated. There were two 64-bit editions, an embedded edition and a tablet edition.