[issue20807] 3.4 cherry pick: 82ec02db7fe6 & ec42ab5e0cb3 Windows installer fixes

[STINNER Victor]

STINNER Victor added the comment:

Changesets 82ec02db7fe6 and ec42ab5e0cb3 (to get the link).

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nosy: +haypo

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue20807>
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