I can't update windows 11 26H2

The screenshot shows Windows 11, version 26H2 is being offered, but the install is failing with 0x800706be. A practical order to try is:

1. Run the Windows Update troubleshooter
   • Go to Start > Settings > System > Troubleshoot > Other troubleshooters.
   • Find Windows Update and select Run.
   • Complete the prompts, then try Download & install again.
2. Turn on early update delivery for 26H2
   • Microsoft states 26H2 is rolling out in phases.
   • On eligible 24H2 and 25H2 devices, it is available for users who turn on Get the latest updates as soon as they’re available.
   • In Settings > Windows Update, switch that setting On, then check again.
3. Use the Get Help app for Windows Update diagnostics
   • The Windows Update troubleshooting guidance recommends starting with the automated troubleshooter in Get Help, which can run diagnostics and attempt fixes automatically.
4. Repair Windows system files
   • Open Command Prompt as administrator.
   • Run:

          DISM.exe /Online /Cleanup-image /Restorehealth
     

   • Wait for the success message, then run:

          sfc /scannow
     

   • When the scan reaches 100%, close Command Prompt and try Windows Update again.
5. Reset Windows Update components
   • Warning: these are advanced command-line steps and require administrator permissions.
   • Open Command Prompt as administrator and run these one at a time:

          net stop bits
          net stop wuauserv
          ren %systemroot%\softwaredistribution softwaredistribution.bak
          ren %systemroot%\system32\catroot2 catroot2.bak
          net start bits
          net start wuauserv
     

   • Restart the PC, then try the update again.
6. Check for software conflicts
   • Third-party antivirus or security software can block updates. Temporarily uninstalling it, updating Windows, and then reinstalling it is a documented troubleshooting step.
   • A clean restart of Windows can also help remove startup/software conflicts during update installation.
7. If the issue continues, use Microsoft support tools
   • Open the Get Help app from Windows for direct update help.
   • If needed, report the problem through Feedback Hub.

Also note: Windows 11 version 26H2 is generally available, but the rollout is phased over the next few months, so availability can vary by device readiness.

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