Seems you can boot off the Windows XP CD (press F12 if Dell at splash screen - or change BIOS(usually press DEL at first screen) to boot off CD first) and go into repair mode. I knew this was possible but didn't know there was a specific repair for the registry. Now this could be dangerous and I don't know how it will work, but it's worth a try. I certainly plan to backup the registry first. The method is to press "r" when the selection page comes up (this is after the Windows CD loads some stuff and the pages gives you the option to load windows, repair windows or exit I believe). I think it loads a couple other things for a few seconds then drops you into the C:\Windows directory in a DOS-looking screen. The command is "chkdsk /r" (no quotes). CHKDSK is a standard DOS program which checks many aspects of the computer's hard drive. The "/r" is a command-line switch which directs CHKDSK to check the Windows registry. I'll update you on how well it actually works. It may be better to purchase a piece of 3rd party registry repair software.
The problem I'm having is the laptop (Dell Latitude D820) looses the ability to go into hibernate mode after some unknown amount of time (1 day, hours, ???). After a restart the feature magically returns. I can't select hibernate from the Power Down menu, the Power Options menu doesn't show hibernate as an option and the hibernate tab (which allows you to enable hibernate mode) doesn't even show up. I have done many modifications to the laptop like reformatting the hard drive, reinstalling Windows, modifying some Windows features and installing a decent amount of useful software (virus protection, Windows Defender, firewall, cleanup software, in addition to the typical software). So I'm quite certain it's something I've done and not the fault of the computer.
Good afternoon
Donald W. Hasson
http://www.linkedin.com/in/donaldhasson
http://donaldhasson.blogspot.com
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An update: I have not had any problems with the computer avoiding hibernate mode since my initial post. I have not done anything. I guess I just scared it to working.
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