updating the sytem registry

[wdm]

When I open AutoCad (2002) I get an error message "failed to update the sytem registry" How do I repair this? I am also getting an error when I try to save a file "error writing/closing file" I can't figure this one out either.

[rkmcswain]

Have you tried searching the Autodesk KB?
http://support.autodesk.com

This may address your problem:
http://usa.autodesk.com/getdoc/id=TS53457