So I was going to play Minecraft today and I had to update my launcher 'cause I haven't played for a while, and when it was done, it had to download Optifine 1.16.5 again, even though I had already downloaded it in the past (if this is normal, please tell me). When it was done, it launched, like normal, but then instantly crashed. It launches Vanilla 1.16.5 just fine, but why not Optifine? Is the game corrupted? I would also like to say, I do not have the best computer either.

Update: Minecraft doesn't even launch at all in the stable release (2.2.1862), so, what do I do now?
Update update: I am being too impatient to let Minecraft load, but it still crashes in 2.2.2008 though...