Question / Help [Solved] HELP. Game lags when I have OBS open!

So, I have been trying to record a video with OBS, and now, after a windows update, whenever I have OBS open and then go to full screen, it stutters. Like some weird lag. This has never happened before and I don't know what to do but ask for help.
The game I am playing is Minecraft. All I do is open OBS, go to Minecraft, go full screen, and it stutters. I don't even start recording, but it does do this while I record too.
Please help!
limit framerate to 30 or 60fps ingame
I have tried this. Limiting the fps still makes the game stutter. But Minecraft does have a VSync option, but the game is so slow with that option. This has never happened before, so I don't know what changed. I even tried uninstalling and reinstalling and it still does this.

EDIT: VSync option does work. But after about 10 minutes, the game started stuttering again.
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