Hi Philipp, I'd suggest starting with the Visual Studio General Questions forum to see if someone can help direct it to the correct location.
https://social.msdn.microsoft.com/Forums/vstudio/en-US/home?forum=visualstudiogeneral
The other option would be in the Windows forums, but I think I'd start with the code side first to see if they are aware of any issues in the different OS versions.
Thanks,
Sam Lester (MSFT)
http://blogs.msdn.com/samlester
Twitter - @SQLSamLester
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