Put the summary of the bug you're having here
What I expected to happen was...:
Trying to start Minecraft normally -error occurs
What actually happened was...:
Minecraft fails to start suddenly
Steps to Reproduce:
1. Click start button
Environment
OS: Windows 10 (ver 10.0, arch amd64)
Java: 1.8.0_25 (by Oracle Corporation)
Launcher: Minecraft Launcher 1.6.61 (bootstrap 100)
Minecraft: 1.10.1 (updated Wed Jun 22 12:14:48 CEST 2016)
Duplicate of MC-103978.