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You can avoid this scenario when installing updates to system firmware or TPM firmware by temporarily suspending BitLocker before applying updates to TPM or UEFI firmware by using Suspend-BitLocker. Method 1:В Suspend BitLocker during TPM or UEFI firmware updates We do not recommend this workaround but are providing this information so that you can implement this workaround at your own discretion. This workaround to temporarily disable BitLocker may put the data at risk. Warning:В BitLocker Drive Encryption helps you protect your organizationвЂ™s sensitive information by encrypting the data. For more information see 'About the Platform Configuration Register (PCR)' at BitLocker Group Policy Settings. On such systems, if the TPM with PCR 7 and Secure Boot are correctly configured, BitLocker binds to PCR 7 and PCR 11 by default. NoteВ PCR 7 is a requirement for devices that support Connected Standby (also known as InstantGO or Always On, Always Connected PCs), including Surface devices. NoteВ You can verify the PCR values that are in use on a device by running the following command from an elevated command prompt:

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For example, you install the Surface dTPM (IFX) update.

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You install a firmware update that updates the firmware of the device TPM or changes the signature of the system firmware. PCR values have been explicitly defined, such as by Group Policy. This behavior can occur in the following scenario:Д«itLocker is enabled and configured to use Platform Configuration Register (PCR) values other than the default values of PCR 7 and PCR 11, for example when: Your Surface device appears to be in an infinite reboot loop. You boot directly into the SurfaceВ Unified Extensible Firmware InterfaceВ (UEFI) settings.

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You encounter one or more of the following symptoms on your Surface device:ДЄt startup,В you are prompted for your BitLocker recovery key, and you enter the correct recovery key, but Windows doesnвЂ™t start up. If you implement this workaround, take any appropriate additional steps to help protect the computer. Before you make these changes, we recommend that you evaluate the risks that are associated with implementing this workaround in your particular environment. You can make these changes to work around a specific problem.

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If you cannotВ run the Surface BitLocker Protector Check on a Surface Book 2 13-inch device, see BitLocker recovery key prompt on the 13-inch Surface Book 2 after the August 2018 UEFI update.Important:В This article contains information that shows you how to help lower security settings or how to turn off security features on a computer. The tool fixed your BitLocker settings, so you don't need to do anything else.

'The BitLocker settings on this device have been successfully fixed.' TheВ tool will automatically resume after your device restarts. Then press EnterВ to restart your deviceВ and applyВ the changes. Print or write down your BitLocker recovery keyВ in case youВ need it. Press EnterВ to restart your deviceВ and applyВ the changes. The tool needs to change your BitLocker settings.

This tool will automatically resume from rebooting.' 'BitLocker has been temporarily suspended. Press Enter to exit theВ tool, and then follow steps 2 and 3 above again. On aВ Surface Book 2 device, attach the displayВ to the keyboard.В If it's already attached, detach it, clean its connectors, and then reattach it. 'Please dock your Surface Book 2 into the base.' Your BitLocker settings are fine, so youВ don't need to do anything else. 'This deviceвЂ™s BitLocker settings do not require any changes.' In the search box on the taskbar, type Surface BitLocker Protector Check, and then select it from the list to open the tool.Дepending on the message you see, take one of the actions below. Here's how to use the Surface BitLocker Protector Check tool:

Note:В The Surface BitLocker Protector Check tool is only available in English, but it will run on all devices.