Since you have build 26100.1742 you can leave Insier program by deleting WindowsSelfHost key from registry.
This will lave you rather stable preview of Windows 11 v24H2 which is be released to public later this year, but it will get monthly cumulative updates on patch Tuesdays (Second Tuesday of month).
- Open open regedit (push Win key and type regedit).
- Navigate to HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\WindowsSelfHost
- On left panel right click that key and delete it.
- Close regedit and restart.
- Check your insider settings to see that its out of Insider Program.
- Check for updates to get latest C.U.
Edit 30/July/2026
If you are having this issue in 2026, refer to these articles:
https://yourwindowsguide.com/2026/07/this-build-of-windows-will-expire-soon.html
No. There is no action needed on your side to resolve the “Your Windows Build will expire soon message”this Build of Windows will expire soon” message, since for most of the channels, the Build with updated expiry date isn’t released by Microsoft.