KB4073290 is new cumulative update and replaces KB4056892, so you can just install KB4073290 directly and without
KB4056892.
Where do you see that?
https://support.microsoft.com/en-us/help/4073290/unbootable-state-for-amd-devices-in-windows-10-version-1709
This is what I see:
"An update is available to fix the following issue that occurs after you install January 3, 2018—KB4056892 (OS Build 16299.192):
AMD devices fall into an unbootable state.
Update replacement information
This update does not replace a previously released update."
I am in a before KB4056892 state, not "after you install" state.
EDIT:
2018-01 Cumulative Update for Windows 10 Version 1709 for x64-based Systems (KB4073290)
Will watch this thread before I implement. Thanks