If your PC still runs Windows 11 version 23H2, the clock just ran out. Microsoft released KB5131087 (OS Build 22631.7711) on November 10, 2026, and it is the last security update for 23H2 Enterprise and Education. Home and Pro editions of 23H2 already stopped getting updates on November 10, 2025.
What "end of updates" means for you
Your PC keeps working. Nothing gets deleted. But from now on, new security holes found in Windows will not be fixed on 23H2. Each month the gap grows, and an unpatched PC is an easy target.
What KB5131087 fixes
Besides the usual security fixes, this update solves a known bug from September: some USB audio devices failed to start or played no sound. If your USB headset or DAC went silent recently, install this update first.
How to check your Windows version
- Press Windows + R, type
winverand press Enter. - The window shows the version (for example 23H2, 24H2 or 25H2) and the OS build.
- Build 22631.xxxx means 23H2.
How to move to a supported version
- Back up the files you care about (OneDrive, an external drive, or both).
- Open Settings > Windows Update and click Check for updates.
- If a newer version of Windows 11 is offered, click Download and install. Your apps and files stay in place.
- At work or school? Ask your IT team: managed PCs usually get the upgrade from them.
If the newer version is not offered, your PC may be blocked by a known compatibility issue. Microsoft lists those on the Windows release health page; it is worth a look before forcing anything.
Quick answers
Is this the end of Windows 11?
No. Only version 23H2 stops getting updates. Newer versions of Windows 11 are still supported.
Will I lose my files when I upgrade?
A normal feature update through Windows Update keeps your files and apps. A backup is still the smart move before any big update.