I've found some interesting things.
I updated my Windows 10 to 17763.1 and got stuck at Boot Logo .
After delete mcupdate_GenuineIntel.dll I can boot to system .
So I have a test .
My CPU is QN8J , CPUID = 906EA , my mothetboard is Gigabyte B150M D3H DDR3 .
If my BIOS have uCode 6A/70/74/7C , Win10 won't let me boot . But if I delete the mcupdate dll , it can boot .
If my BIOS have uCode 84/96 , I can boot with the mcupdate dll , and use AIDA64 checked , the uCode version is 96 .
I also tried InSpectre to disabled both protection and nothing happens , I still cannot boot with old uCode in BIOS and new uCode in system .

For test purpose , I reinstall 17134 , and I can not boot with 4 version of mcupdate_GenuineIntel.dll ( 17134.1 17134.48 17134.253 17314.318 ).
I must delete it to boot with 6A uCode in BIOS .

Sounds like Intel/MS got together to stop microcode changes by end user, of course they would say for security reasons, but you know some of that is to stop hacks we do

It is likely either a bug (and it is not the first time something like this happened, either), or downgrade of microcode past one of the security level barriers.

Intel has no reason at all to get in the way of overclocking "K" parts as long as it is done according to its specifications for the platform, and they care not if you mess with the microcode revision as long as it is not going to look like "downgrading to avoid a security fix". And Microsoft doesn't care either way.

Any one know when next update 306c3?

!New_cpu906EB_plat02_ver000000A4_2018-10-24_PRD_EDDD5F72
!New_cpu906EC_plat22_ver000000A2_2018-09-29_PRD_FCAF004B

cpu50655_platB7_ver0300000D_2018-06-15_PRD_3A8A57A1

Hey pluto,
Thanks for the microcode repository. Do you have any idea about the changes in the latest 57 version of the 50654 microcode (or the previous 55 version from latest UBU)?
(cpu50654_platB7_ver02000057_2018-10-22_PRD_26B11B5A.bin)
Would it be more stuff related to spectre mitigation? Is there any place to find hints about microcode changes?
Thanks!

cpu50656_platBF_ver04000014_2018-12-17_PRD_6AC0F5A2
cpu50657_platBF_ver05000014_2018-12-17_PRD_E1FFC46B

2018-12-17, I win! :D

!New_cpu50654_platB7_ver02000059_2018-12-20_PRD_D2B4FBC1.bin