Summary: "You may see an issue where on every boot Windows BitLocker asks for a recovery key on USB type-C or Thunderbolt 3 equipped systems".
BitLocker is an encryption function of the Windows operating system. You may encounter an issue where on every boot BitLocker asks for a recovery key. Further investigation in to the issue found this is occurring on systems a USB Type-C (USB Type-C only & Thunderbolt 3) ports.
BitLocker monitors the system for changes in the boot and configuration. When BitLocker sees a new device in the boot list or an attached external storage device it will prompt for the key for security reasons. This is normal behavior.
This problem occurs because by default USB-C / Thunderbolt 3 (TBT) boot support and Pre-boot for the TBT is on.
By turning these options off in the BIOS the Thunderbolt / USB-C is removed from the boot list and BitLocker does not see it.
The only negative effect of this configuration change is you will not be able to PXE boot from a USB Type-C or Thunderbolt 3 dongle or dock.
To resolve the issue please follow the steps below.
Upon doing this the system should not prompt for the BitLocker key on every boot.
For further support and guidance please view our instructional video "Resolve BitLocker Recovery Key Prompts"
Article ID: SLN304584
Last Date Modified: 09/14/2019 08:45 AM
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