11/04/2026
If Smart App Control's toggle turned gray after Windows updated in October, your PC was never left unprotected. Microsoft already fixed the bug in updates released October 27 and later. On 25H2 and 26H2, install KB5127936 or a later update and restart to get the switch working again.
Smart App Control grayed out after a Windows 11 update? Microsoft's October KB5127648 bug is fixed in KB5127936 and later updates. Here's who was affected.