Ardacraft crashes while starting up due to mod problem

how did you install the modpack?: launcher
have you installed Java 8?: yes
when does the problem happen?: during launch
When the game starts up the window opens but crashes immediately.

Not very technical but I think you didn’t install Java 8 correctly, it says Java version: 1.6.0_65.

I re downloaded java 8, yet the same problem occurs

Remove Java 6 entirely, and then install Java 8. Hope this works for you.

How do I do this?

He seemed to be on earlier. Guan resolved it I assume.