After installing VS2015 in W10, and trying to compile a project which works perfectly in W7, I´m getting this error: Unsupported major.minor version 52.0.
If you have multiple JDKs then remove them. Install JDK 8 the latest version and go to Visual Studio options => Xamrin and set the Java Development Kit Location to the JDK 8 path e.g C:\Java\JDK\jdk1.8.0_92.