python-2.7.11.msi destroys PATH env var?

[Chupo]

After installing Python 2.7.11 through python-2.7.11.msi Windows 
installer OS couldn't anymore detect antivirus software so after some 
investigation I found that PATH environment variable was completely 
removed from the system. I had to recreate the PATH var and add:

%SystemRoot%\system32;%SystemRoot%;%SystemRoot%\System32\Wbem;

into the path so the WMI could detect antivirus again.

Can anyone confirm the same problem?

I marked 'Add python.exe to PATH' during the installation process.
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Chupo