Installation of a TPM firmware update on devices in one of the following unrecommended conditions may result in devices entering a condition where devices boot to BitLocker Recovery, but are unable to boot to Windows even when the correct recovery key is entered.
If your device meets one of these conditions, you will need to suspend BitLocker before installing this update. It is highly recommended that devices in these conditions are returned to the default, recommended configuration with Secure Boot enabled and validation using PCR 7 and 11. Configuration of Secure Boot or BitLocker PCR values other than default are not-recommended on Surface devices.
For more information regarding correcting these conditions or if your device has entered a BitLocker Recovery state after installing these updates that is unable to boot to Windows, even when you enter the correct recovery key, see KB4052978 .
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