Subst drives only visible to some applications?

Well this had me stumped for a while. I have a Z drive mapped to a folder on C using VisualSubst.

Yet some applications would deny that the Z drive existed. Very odd.

Finally it dawned on me - the applications which could not see Z were running as administrator.

The solution? Run VisualSubst again, this time as administrator and the drive mapping will not be listed.. add it here and voilá. All applications can now see your mapped drive letter.

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For a better solution, see http://en.wikipedia.org/wiki/SUBST#Method_3