End of Support screen at bootup.

Press Win + R, enter winver, and use the displayed edition and version to determine whether the computer is actually running Windows 11 or has booted back into Windows 10.

If winver shows Windows 11

The Windows 10 end-of-support notice does not mean Windows 11 itself is unsupported; Windows 10 support ended on October 14, 2025, while Windows 11 servicing is determined by its installed version.^1^

1. Open Settings > Windows Update.
2. Select Check for updates and install all offered updates.
3. Restart and run winver again. If it reports Windows 11 version 22H2, that release is out of servicing and must be upgraded to a current Windows 11 release.^2^

If Windows Update fails or the notice returns:

1. Go to Settings > System > Troubleshoot > Other troubleshooters.
2. Next to Windows Update, select Run.
3. Restart, then return to Settings > Windows Update > Check for updates.^3^

Next, repair the Windows component store and protected system files:

1. Search for Command Prompt.
2. Select Run as administrator.
3. Run these commands in order:

DISM /Online /Cleanup-Image /RestoreHealth
sfc /scannow
shutdown /r /t 0

If the notice appears only after signing in

A startup application can display a separate reminder after Windows loads.

1. Press Ctrl + Shift + Esc and open Startup apps.
2. Disable PC-manufacturer support or reminder utilities associated with upgrade or lifecycle messages.
3. Open Settings > Apps > Installed apps.
4. Remove obsolete Windows upgrade-assistant or PC-health utilities that are no longer needed.
5. Restart.

Disable only the likely reminder utilities—not driver, graphics, audio, touchpad, or security software. If the notice appears before the sign-in screen, this startup-app branch does not apply.

If winver shows Windows 10

The PC has booted into Windows 10. This usually means the Windows 11 upgrade did not complete, or the computer booted a different Windows installation. Windows 10 end-of-support notifications are expected on an out-of-service Windows 10 installation.^4^

Retry the upgrade with the Windows 11 ISO:

1. Ensure the C: drive has at least 40 GB free.
2. Download an ISO matching the current Windows display language.
3. Disconnect unnecessary external devices, leaving the keyboard and mouse.
4. Double-click the ISO in File Explorer, run Setup.exe, and choose Keep personal files and apps.^5^
5. If third-party antivirus blocks Setup, disable it only for the upgrade attempt and re-enable it immediately when Setup finishes or the attempt ends. Keep Microsoft security protection enabled where possible.
6. After completion, run winver to verify that Windows 11 is now active.

If winver shows a current Windows 11 release, all updates install successfully, system repair finds no remaining corruption, and the full-screen notice still appears before sign-in, record the exact Windows version/build and photograph the notice before contacting Microsoft Support.

References

1. End of support for Windows 10, Windows 8.1, and Windows 7
2. End of servicing statement | Microsoft Support
3. [Windows 11](https://support.microsoft.com/windows/experience/windows-update-troubleshooter)
4. Windows 10 notification: “Your device has reached the end of service” | Microsoft Support
5. Upgrading from Windows 10 to 11 Fails after Reboot - Microsoft Q&A