Microsoft released its October 2026 Patch Tuesday updates for Windows 11, addressing 1,413 vulnerabilities, including a critical fix for an exploited Windows Shell vulnerability (CVE-2026-96951) that bypasses Mark of the Web defenses. This update is the last monthly security update for Windows 11 24H2 Home and Pro users, who must upgrade to a supported version for future security fixes. The update packages KB5127648 and KB5127646 cover versions 24H2, 25H2, and 26H2, and also include fixes for reliability issues such as Explorer.exe startup failures, VPN connection problems, and gaming mouse stuttering. Additionally, the update resolves issues with AC-3 playback, printing failures, and fingerprint sign-in failures after a cold boot. Users are advised to install the updates promptly and restart their systems to complete the process.