Windows 11 version 23H2 reaches the end of updates tomorrow, 10 November 2026, for its business and education editions. Microsoft's release health page states that the November 2026 security update, shipped on Patch Tuesday, is the last update available for those editions. After that date, affected devices will no longer receive the monthly security updates that protect against the latest threats.

Which editions are affected

The deadline covers Windows 11 version 23H2 Enterprise, Education, IoT Enterprise and Enterprise multi-session. Home and Pro editions of 23H2 already reached the end of updates on 11 November 2025. The split reflects Microsoft's servicing rules: Home and Pro get 24 months of updates per version, while Enterprise and Education get 36 months. Version 23H2 shipped on 31 October 2023, so November 2026 marks the end of its three years.

What happens after 10 November

Nothing stops working on the day itself. PCs running 23H2 Enterprise or Education will keep booting and running apps, but every new vulnerability found after the deadline will go unpatched on those machines. That is the real risk for organisations: an unpatched fleet becomes easier to attack with every passing month. Microsoft recommends moving eligible devices to a supported version of Windows 11 to keep receiving monthly security updates.

What to move to

Microsoft's earlier guidance pointed 23H2 users at Windows 11 version 25H2, whose Enterprise and Education editions remain supported until October 2028. Version 26H2, the Windows 11 2026 Update, is the newer option. To check a machine, open Settings, then System, then About: build 22631 means version 23H2, and that machine needs an upgrade plan before tomorrow's final patch.