minecraft isint letting me enter the game and say minecraft crashed and i cant open it even when i restart my computer

Put the summary of the bug you're having here ''i dont know if it is a bug or something''

What I expected to happen was...:
Describe what you thought should happen here

What actually happened was...:
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Steps to Reproduce:
1. Put a step by step guide on how to trigger the bug here
2. ...
3. ...