[issue20807] 3.4 cherry pick: 82ec02db7fe6 & ec42ab5e0cb3 Windows installer fixes, pip uninstall failure

Tue Mar 4 11:37:51 CET 2014

Changes by STINNER Victor <victor.stinner at gmail.com>:

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title: 3.4 cherry pick: 82ec02db7fe6 & ec42ab5e0cb3 Windows installer fixes -> 3.4 cherry pick: 82ec02db7fe6 & ec42ab5e0cb3 Windows installer fixes, pip uninstall failure

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