Command windows remain open on Windows 10 Build 9926

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Windows 10 Pro Technical Preview build 9926

cygwin               1.7.33-1
mintty               1.2-beta1-1

When launching mintty, 2 additional console windows appear visible as shown in 
screenshot attached.

Appears to be another instance of this old issue: 
https://code.google.com/p/mintty/issues/detail?id=39

Running in compatibility mode for Windows 8 fixes the issue, so I'm guessing 
the check for which OS the "Windows 7 hack" needs to be applied to simply needs 
to be updated.

Original issue reported on code.google.com by cl...@clintarmstrong.net on 24 Jan 2015 at 11:03

Attachments:

• [Screenshot (1).png](https://storage.googleapis.com/google-code-attachments/mintty/issue-439/comment-0/Screenshot %281%29.png)

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I'm not sure it's related to mintty, but  perhaps to windows conhost.exe 
instead?

If you run screen, a new console windows also appear when you create a new 
screen window (^a c).

Here setting the compatibility mode for windows vista/vista sp1/vista sp2/win7 
or 8 doesn't change anything. 

Windows 10 Pro Tech Preview Build 9926
cygwin  1.7.33-1
mintty  1.2-beta1-1
screen  4.2.1-2

Original comment by yunga.pa...@gmail.com on 17 Feb 2015 at 3:03

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