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I recently enabled "Do not preserve zone information in file attachments", to get rid that annoying "Do you want to run this program" security warning. Now, how can I add this information to a file that doesn't have it? I would like to get that warning back on certain files when I try to run them.

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up vote 2 down vote accepted

From the elevated command-line (administrator rights) do this:

icacls <filename> /setintegritylevel low

This achieves what you have asked for.

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