Microsoft "Show or hide updates" troubleshooter package does indeed work to hide KB4056892. However, the timing is tricky: You have to run it after Windows 10 has repaired the KB4056892 update -- after the update has been rolled back but before it's been downloaded and installed again (waiting to restart). Run wushowhide.diagcab, click "Advanced," uncheck "Apply repairs automatically," and click "Next." After a while, you'll get two choices -- pick "Hide Updates." You should then see KB4056892 to select to hide. If KB4056892 isn't shown, then I guess the timing probably wasn't right for executing wushowhide.diagcab. http://download.microsoft.com/download/f/2/2/f22d5fdb-59cd-4275-8c95-1be17bf70b21/wushowhide.diagcab
(I tried to let Windows Update automatically install several times and then installed the standalone update, each time ending with just the Windows 10 logo with no animation and no hard disk activitity right after rebooting. A couple of reset buttons should put you into repair mode. My problem is on a computer with an AMD Athlon 64 X2 4200+, Asus M3N78 Pro Motherboard. Normally, works great. KB4056892 installed okay on all my other computers, including three other AMD processors.)