Firstly, see the “main” thread about this issue: Extremely slow startup, loss of Bluetooth, external storage not recognized - #18 by drojf
In short, the issue happened again, so I contacted support, who eventually agreed to replace the motherboard. I never figured out a series of steps which would ‘fix’ the issue reliably.
If you just need to use your computer in the mean time (without using the USB ports), there is a workaround that Nicholas Shepard posted in that thread.
1 - First Boot into bios.
- I found the easiest way to get into bios was to use Windows 11’s Advanced Startup Options (type in start menu) → “Advanced Startup” ->restart now .
- Then you may need to forcibly restart the computer if it won’t power off itself
- Then when the recovery menu appears some time later, go Troubleshoot->Advanced Options → UEFI Firmware Settings
- Again forcibly restart the computer to get into bios
2- When the bios appears, go Security → I/O Interface (scroll all the way down) → External I/O Ports and disable external I/O Ports.