Terrible Lag

So this is an issue that has just started today. I have DS 2021 installed on a Windows 10 system. Everything was working fine but now there is terrible lag in the graphics area, to the point the software is unusable. I have updated all graphics drivers, disabled/re-enabled GPUs, done a clean re-install of DS, and nothing seems to be working. I really need this fixing as I am in the middle of a very time sensitive project and I can't afford to fall behind. Please help! Thanks