Microsoft will end update support for Windows 10 in October 2025, but new patches are still being released. The latest cumulative update, KB5058379, has caused issues for users, especially those with devices from Dell, Lenovo, and HP. Microsoft is aware of the problems and has not yet deployed a fix as of May 16, but has provided a temporary workaround.
For users affected by the BitLocker bug, Microsoft Support recommends the following steps to regain access:
1. Disable Secure Boot in BIOS/Firmware settings.
2. If issues persist, disable all virtualization technologies in BIOS/Firmware settings.
3. Check the Microsoft Defender System Guard Firmware Protection Status via Registry Editor or GUI method.
4. If firmware protection settings are restricted by Group Policy, disable them using Group Policy Editor or Registry Editor.
A system restart is required for these changes to take effect, and these workarounds should only be temporary until a patched update is released. Disabling certain BIOS settings may compromise system security.