https://www.bleepingcomputer.com/news/microsoft/windows-11-upgrade-block-lifted-after-safe-exam-browser-fix/

Microsoft has removed an upgrade block that prevented some Safe Exam Browser users from installing the Windows 11 2024 Update due to incompatibility issues.

Safe Exam Browser is an open-source software used by schools, professional certification bodies, and enterprises to transform computers into secure workstations during online exams, preventing cheating by restricting access to unauthorized resources, apps, and websites.