I did try to disable all my cameras, CPU stayed the same indeed. Funnydisable the camera that is not working, You are wasting CPU time doing nothing.
The direct to disk information in BIupdatehelper is not accurate. It is normally unknown.
Make sure all your cameras are set to record in BVR.
Reboot after make changes so you get a clean start.
View attachment 54338
Every cam is configured with BVR and Direct already.