I try to launch minecraft but it doesnt work

Put the summary of the bug you're having here

What I expected to happen was...:
Describe what you thought should happen here
that when I press play it would work
What actually happened was...:
its stayed on the launcher and gave me a crash report
Describe what happened here
I pressed play and it crashed

Steps to Reproduce:
1. Put a step by step guide on how to trigger the bug here
2. I launched minecraft.exe
3. pressed play
4. crashed