On Windows 7 Pro X64 your MCH driver sometimes causes a 0x50 Bluescreen. It is signed with my EV cert (with cross signing) and signed by MS.
If I omit MS signing, those crashes do no occurr.
On Windows 10 there are no bluescreens with that binary.
It is tested with MCH installer 126.96.36.199 on a cleanly installed and fully patched Windows system.
In a short test your beta version from 188.8.131.52 did not cause any bluescreen.
Is that problem solved in your beta?
If yes, when will this be released?
I'm planning to release a new official build soon, probably later this week. The beta build should be totally safe to use for you. It's identical to the official build + the one bugfix.