After leaving minecraft for some time, I decided to come back on today. I clicked "play and it all seemed fine, I waited 1 minuet for it to load up to preform the mojang logo. Nothing. I restarted my computer multiple times, nothing. Asked my friends what to do and they told me to uninstall and to reinstall it. Still, did not work. I hope I can get a salution quickly. Thank you - UmGabby
Try the possible fixes in MC-124460:
This issue is caused by Discord; exiting Discord (make sure the process is actually not running anymore) should fix it.
If exiting Discord doesn't fix this issue for you, try running Minecraft as an administrator.
Also other incompatible software like Razer cortex's overlay, and nvidia gamecaster causes this effect.