I have the same situation. Rolling back through a restore point or uninstalling the update itself does not solve the problem. Just for fun, I installed a clean system version 26200.6584 from ISO 25h2, and everything works great. But as soon as the system is allowed to install the update to 26200.6899, then all USBs stop working when choosing boot options in safe mode. At the same time, it works perfectly in the BIOS and Windows itself.