Some applications at the university (like Raindance and NyA) do only work with the soon obsolete Java 7 and not the current (2015) Java 8.
- First go to Programs and Features.
- Uninstall Java 8
- Go to the download Java 7 page.
- Save as.
- Save as File Name with .exe in the end
- View downloads, open folder, run and install.
- Remember to not install the Ask tool bar. Uncheck it.