1909 realtime spikes when using GUI

1909 installed last night and although I’ve been having realtime CPU spikes with C10.5 and Slate plugins it seems so much worse on this system. When using any GUI or disk save operations Cubase interrupts. I had this before on earlier Windows OS but it was cured. Any pointers on where to look for OS or Drivers causing these CPU spikes all of a sudden?

Updated two systems from 1903 to 1909 (small update) and then C10 to C10.5. No noticeable change in system performance on either DAW.

Ok thanks good to know. Something has changed in the system over the past days so will troubleshoot further