Time for an update. I've no longer got the freeze/stutter. I've upgraded my HDD to a NVME & put win 10 pro on it & RF2, new install with all new drivers & the very fast HDD have all solved my problem. Hope that helps anyone else. My system NOW, ASRock z370 K6 i5 8600k 16 gig ddr4 GTX 1080 Samsung NVME 970 pro 512gig SS