Microsoft fixes Smart App Control broken by October Windows update
Microsoft addressed a known issue stemming from the October 2026 KB5127648 Windows 11 security update that blocked some users from enabling Smart App Control, a built-in security feature. The resolution restores functionality for affected systems.
Key points
- Bug affected Smart App Control activation after October 2026 update
- Issue prevented users from enabling a key security feature
- Microsoft has now resolved the problem
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