Windows 11 Build 22635.3936 Not Receiving Updates After Leaving Insider Program

Leaving the Insider Program does not itself replace the preview build already installed, so an unenrolled device can still be running 22635.3936. To investigate keeping your applications, use the official ISO from inside your running Windows installation, rather than booting from it. First create a backup of irreplaceable files and obtain any device-encryption recovery key. Mount the ISO, run setup.exe, and inspect Change what to keep before committing to installation. The required choice is “Keep personal files and apps.” Use media matching the installed edition, architecture and system language. If that option is unavailable or Setup reports an unsupported upgrade path, cancel and record the exact message; do not select files-only or Nothing. Microsoft documents both in-place and clean-install routes, but this particular preview-to-retail transition must pass compatibility checks. Since you lack a complete backup, stop at the compatibility assessment until your important data is protected