I try joining/creating world and it automatically turns me back to this screen that says there's a bug of some sort, I'm still able to log in to my account though.

Put the summary of the bug you're having here

What I expected to happen was...:
To play single-player/multiplayer
What actually happened was...:
It sent me back to a screen the said the windows couldn't support java or something, and said there was a bug.

step1: Log into my account
step2: Click on multiplayer or single-player
step3: Join a server or create/load a single-player map
step4: This is when the screen pops up with a whole bunch of stuff that i believe says there is a bug and windows can't support java or something?