Interesting new problem. I can't play my Blu-ray rips (.m2ts) on my "high performance" computer but they play okay on my low-performance system. I stream all my movies/music from a central server over a wired network.
I just finished setting up MC 16.0.126 on my bedroom computer (it is a AsRock H67-ITX with i3-2100 and 4GB ram running Win7 32bit). I can not get my BD rips to play smoothly. They are showing "blocks", skipping and sticking. I can play all my DVD rips (.vob) without a problem. I now have Video set to RO Standard (but I should be able to use RO-HQ on this system). Before I installed MC16, I was using 7MC with Shark007 code pack, LAV Filters and MadVR without a problem, so I'm sure it is not the computer, it must be something in my MC setup - or maybe my network is the issue (although it works fine on my Familty room system).
My family room computer is a Gigabyte GA-E7AUM (the GeForce9400) with a CoreDuo E8400, 4Gb memory and a dGPU (an Asus GT440). This computer is less powerful than the bedroom system, but I can play all my Blu-ray movies without issue using RO-HQ and Lav CUVID. I bitstream this to a Onkyo 705 receiver. So this system has no problem, but my other (bedroom1 system is having problems with same movies over same network).
What should I check first? I've been through all the settings and I (think) have the lower performance settings selected.