[docs] [issue24757] Installing Py on Windows: Need to restart or logout for path to be added

[eryksun]

eryksun added the comment:

I think a custom action can be added to Tools/msi/msisupport.c to send a [WM_SETTINGCHANGE][1] "Environment" message to top-level windows. This makes Explorer reload its environment from the registry, so starting a new command prompt (cmd.exe) from Explorer will see the updated PATH. 

[1]: https://msdn.microsoft.com/en-us/library/ms725497

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nosy: +eryksun

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<http://bugs.python.org/issue24757>
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