Crash a few seconds after launching

Launcher crashes 3 seconds after launching.

A timer (com.sun.webkit.Timer.fwkSetFireTime) defined at launch crashes with EXCEPTION_ACCESS_VIOLATION.

Steps to Reproduce:
1. Launch Minecraft (Tried launching with Administrator rights, also setting these on javaw.exe, but to no avail.)
2. Wait roughly 3 seconds. Launcher disappears