Microsoft is winding down support for Windows 10 this October and has released update KB5058379, which has caused unexpected BitLocker recovery prompts for some users after a restart. This issue has been confirmed by Microsoft representatives on forums, although it is not mentioned in the update's release notes. The problem predominantly affects devices from manufacturers like Dell, HP, and Lenovo, and the specific cause is unclear. Microsoft has provided workarounds, including disabling Secure Boot and virtualization technologies, checking Microsoft Defender System Guard Firmware Protection status, and disabling firmware protection via Group Policy or Registry Editor.