RICVBA,
Before installing Windows 10, did you try to restore your system to an earlier date than this you intalled VS 2015 Comunity and try a new installation ?
By my side I have a computer (Windows 7 Pro) with many Visual Studio versions installed (VS 2008 Standard, VS 2010 Pro, VS 2012 Pro, VS 2013 Community Edition, VS 2015 Community Edition) and all are working fine.