Device not recognized in bootloader mode
From Trezor Wiki
(Redirected from Device not recognized in bootloader mode on Windows 8 & 10 (unable to get to the firmware update screen))
This article is a workaround solution for users who are unable to access the bootloader mode and cannot get to the firmware update screen when using their Trezor device with a Windows 8 or 10 computer.
Please follow the instructions below:
2. Confirm both dialogue windows.