Windows Update KB5012170 May Ask for a BitLocker Recovery Password
概要: A recent Windows Update (KB5012170) causes computers to prompt for the BitLocker Recovery Key upon reboot.
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現象
Windows presents the BitLocker Recovery screen after the KB5012170 update is installed, and the computer reboots (Figure 1).
Figure 1
Note: Dell and Microsoft support agents DO NOT have access to BitLocker recovery keys. Follow: Where to Look for Your BitLocker Recovery Key (Microsoft.com) 
Windows Versions Impacted:
- Windows 10
- Windows 11 - Build 21H1 and Higher
原因
Issue with Windows Update KB5012170.
解決方法
Windows Update
Microsoft changed KB5012170 to an optional update on September 20, 2022 and resolved the issue with KB5022905.