My Minecraft it crashing every time I go into it

Put the summary of the bug you're having here

*What I expected to happen was my minecraft was going to open and I would play.
Describe what you thought should happen here
*my Minecraft should have opened and ran like normal.

What actually happened was...:
The launcher said my game had crashed. It has done this ever since we got windows ten

Steps to Reproduce:
1. Hit "play" on the bottom of the screen in the launcher