KB5094126, released in June 2026, is causing significant issues for Windows 11 users, including BSODs, boot failures, BitLocker lockouts, and problems launching Office applications. This update has particularly affected HP enterprise hardware, leading to BitLocker recovery loops and black screens. The issues stem from disk space limitations related to Secure Boot certificate handling and restricted EFI partition space. Affected users are advised to locate their BitLocker recovery keys and consider workarounds, such as launching Office applications directly. Windows 10 users are also experiencing similar problems due to the related update KB5094127. Microsoft is expected to release fixes in subsequent updates, including KB5101650 in July 2026.