The computer may or may not stop responding (hang) during a BIOS update. This issue occurs when the BIOS is updated from the BIOS setup utility (F10) over a network connection.
Two issues are exhibited:
Issue 1. Computers without Intel Teton Glacier installed or enabled:
The computer can boot to Windows, but some of the driver functionality is lost because the Secure Boot feature is disabled.
Issue 2. Computers with Intel Teton Glacier installed or enabled:
The computer cannot boot to Windows.