March 31st, 2024 
Kapuwa Source | Microsoft https://support.microsoft.com/en-us/topic/kb5034439-windows-recovery-environment-update-for-windows-server-2022-january-9-2024-6f9d26e6-784c-4503-a3c6-0beedda443ca
Recommended methods available at
To avoid this error or recover from this failure, please follow the Instructions to manually resize your partition to install the WinRE update and then try installing this update.
Or, to use a sample script to increase the size of the WinRE recovery partition, see Extend the Windows RE Partition.
Windows Server 2022
Summary
This update automatically applies Safe OS Dynamic Update (KB5034235) to the Windows Recovery Environment (WinRE) on a running PC to address a security vulnerability that could allow attackers to bypass BitLocker encryption by using WinRE. For more information, see CVE-2024-20666.
NOTE If your running PC does not have a WinRE recovery partition, you do not need this update. To verify if you have WinRE enabled, you can run the following command in an elevated command prompt: reagentc /info
If WinRE is enabled you will see Windows RE status in the output with a value of Enabled.
| IMPORTANT This update requires 250 MB of free space in the recovery partition to install successfully. If the recovery partition does not have sufficient free space, this update will fail. In this case, you will receive the following error message: 0x80070643 – ERROR_INSTALL_FAILURE To avoid this error or recover from this failure, please follow the Instructions to manually resize your partition to install the WinRE update and then try installing this update. Or, to use a sample script to increase the size of the WinRE recovery partition, see Extend the Windows RE Partition. |
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