Windows 10, VLC 3.0.6 3.2 GHz CPU with 8 cores, 32 GB DDR4 memory. Blu-ray '.ISO' on a USB3 HDD mounted via Virtual CloneDrive. I'm experiencing judder & up to 5 seconds of frozen frame. Also short frozen frames as often as 1 per second. The symptoms are variable and appear to be non-repeatable....