March 5, 2018—KB4090913 (OS Build 16299.251)
“This update includes quality improvements. No new operating system features are being introduced in this update…Addresses an issue in which some USB devices and onboard devices, such as a built-in laptop camera, keyboard, or mouse, stop working.”
This update is a cumulative update. That means it will apply the Meltdown/Spectre patch from past months.
Win10 Updated
This update appears to fix the USB 3 problems I had (i.e. USB flash drive not recognized). This is a good thing (but this issue never should have existed in the first place).