1. The new Windows 10 Hardware-accelerated GPU scheduling ("HAGS") added with version 2004 is currently known to cause performance and capture issues with OBS, games and overlay tools. It's a new and experimental feature and we recommend disabling it via
these instructions.
2. Run OBS as Admin. Right click on the OBS shortcut, properties, advanced, check box, ok, apply, ok.
3. In OBS, go to "Settings -> Advanced" and set "YUV Color Range" back to "Partial".