Windows 11 Insider Preview channels grayed out for months — Build 29648.1000 (rs_prerelease)

Flight Hub lists build 29648.1000 under Experimental (Future Platforms). Microsoft's Insider guidance says this branch is not aligned to a retail Windows release, and moving from it to another channel requires a clean installation. The disabled alternatives are consistent with that restriction; they are not evidence that your Ryzen processor or Windows Home edition is the problem.

Confirm the build with winver and check enrollment under Settings, Windows Update, Windows Insider Program. If you want to remain on Future Platforms, check for newer flights rather than expecting the older build to unlock other channels.

If you want Beta, another eligible channel, or stable Windows, back up your files and use official Windows installation media for a clean installation. Reinstall applications afterward and enroll in your chosen channel only if required.

Avoid forcing channel names through registry edits: that does not change the installed Windows core version.