Massive lag and fps drop MCC PC

So I finally got the game to launch but when in campain or multi just touching a movement key, shooting, anything causes my fps to drop and studder to under 5 for a few seconds. If I stand still and not do anything the game is fine. Plus there are times where the Game constantly freezes in either the [Press Enter to Start] splash screen or in the menu with all the other things you can go to (ie the game, settings etc). The game is completely fine when launching the client with anti cheat disabled but has tons of problems when running the normal client with anti cheat. Anyone else having these problems?

Wish 343 would post something about all these problems.

Update Midnight 12/3: So I plugged in a controller and this solved every issue with the game. I don’t know why using a MnK causes such errors. I hope it gets patched fast. I do NOT want to play on my pc with a controller.

I have this exact problem. Are there any fixes out there?

Edit:
I uninstalled Razer Cortex. That fixed the issue.

Uninstalling Razer Cortex solved this for me, too.

Killing RazerCortex Task in Task-Manager helps too

I have no RazerCortex installed and the problem is here. I have a rather clean system. Halo is on the second SSD installed and some VR stuff aside from game launchers and Windows. Please fix.