"permission denied" issues when removing files/folders created by cygwin

[Roger Pack]

As a note, after using cygwin to build some libraries (worked well,
thanks team!) when trying to delete a folder via windows explorer, I
got the message  "Destination folder access denied, you need to
confirm this action"  (followed by a UAC prompt) and also
"Delete folder, Invalid MS-DOS function"

It appears the problem lies with creating a file named "NUL" windows
utilities just don't know how to deal with it (you can recreate it by
creating a folder, then from cygwin bash $ touch NUL) then try and
remove the folder with windows explorer.

I would not have expected cygwin to allow itself the privilege of
creating files that are unremovable by windows explorer, but I just
thought I'd throw it out there.

Cheers!
-roger-

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