Windows XP won't store any registry values

A PC got incrediby low on disk space.  After restarting, all settings were lost so no desktop wallpaer, can't save one, can't customize the Start Menu using START |PROPERTIES.  MS Office won't run.  Registry looks OK in visual examination.

Ran sfc and it is OK.

When installing a program, I get Error Creasting Registry Key, Access Is Denied.  RegCreateKeyEx failed: code 5

Any advice other than a complete XP reinstall?
dettoreAsked:
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Irwin SantosComputer Integration SpecialistCommented:
Probably the best thing would be to reinstall.
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Irwin SantosComputer Integration SpecialistCommented:
you will spend more time fixing up your OS than a FRESH spanking brand new install.  Just backup your files.
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nobusCommented:
i would try to get more space first, and see if that somehow cures your problem.
you can delete in IE all temp files and folders
search for temp or tmp files and folders, and delete them
uninstall old and unnecessary software
how much space do you have left?
backup what you can and delete it from the disk.
Then run a disk scan for errors on it, and a defragmentation
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dettoreAuthor Commented:
I solved the problem by changing the Permissions inside the registry.  Somehow, the Administrator permissions were shut off.  I gave full control and everything is now fine.
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Irwin SantosComputer Integration SpecialistCommented:
cool... perhaps you want to close the question.
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