> Thanks Jesper for these interesting references. What puzzles me is how this
> denial of permission has happened only once on one particular folder that I
> created on an external hard drive on a Windows XP computer.
It has to do with the permissions on that folder. XP set them to allow only
Administrators full access. That works on XP, but not on Vista.
> Incidentally, any file that is added to the offending folder, immediately
> becomes locked and unable to be read, copied or deleted on my Vista
> computer.
Without going into a very long explanation, this has to do with how
permission inheritance works. Any new file you add to the folder gets the
permissions the folder specifies to put on it, which is usually, but not
always, the same as the permissions on the folder. The longer description is
in the book.
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Your question may already be answered in Windows Vista Security:
http://www.amazon.com/gp/product/047...otectyourwi-20