Currently due to behavior changes GetVersionEx unless mongod/mongos is manifested to target OS versions after Windows 8, the GetVersionEx function always returns Windows 8. This makes detecting the customer's OS from logs difficult since the logs will get wrong information.

References:
https://msdn.microsoft.com/en-us/library/windows/desktop/dn481241(v=vs.85).aspx
https://stackoverflow.com/questions/27246562/how-to-get-the-os-version-in-win8-1-as-getversion-getversionex-are-deprecated