I've just downloaded AT Launcher (Minecraft modpack launcher), and it requires Java 7, and DOES NOT work with Java 8. The bad thing is that it doesn't start before you remove Java 8 from the computer, and only have Java 7, so I wonder if I can just disable Java 8 temporarily when the game starts, instead of having to uninstall it?
Is this possible?
Best How To :
The solution I found for THIS program (ATLauncher) was to download a little jar-file called LegacyJavaFixer (specific for only ATLauncher though) and place it in each modpack folder.
It doesn't seem to be possible to do it from batch?
I'll mark this answer as correct as long as noone else posts another "universal" solution.
Thanks to you who have tried to help!