Windows 11 Insider Preview Feature Update (26300.9032)

Question

Windows 11 Insider Preview Feature Update (26300.9032)

Ir. Dr. P.M. Kalai Vaanan Maniam 20

why keep fails when reach 99%...multiple attempt...
Windows 11 Insider Preview Feature Update (26300.9032) - Failed to install on ‎11/‎8/‎2026 - 0x80070102

Please guide me...
Thanks

Ir. Dr. P.M. Kalai Vaanan Maniam 20 Reputation points

2026-08-13T04:14:16.5233333+00:00

Thanks Vikki-T... appreciate for the kind support and its work well. Manage to update accordingly. Regards
Vikki-T 8,550 Reputation points Microsoft External Staff Moderator

2026-08-13T13:01:32.6833333+00:00

Hi Ir. Dr. P.M. Kalai Vaanan Maniam,

Thank you so much for the update, and I'm truly very happy to hear back from you.

If you ever have any other questions or run into anything in the future, please feel free to post your question on the Microsoft Q&A Forum anytime. I’ll always be here and ready to assist you.

Wishing you a great experience ahead!

Answer accepted by question author

Vikki-T 8,550 Microsoft External Staff Moderator

Hi Ir. Dr. P.M. Kalai Vaanan Maniam,

I understand how frustrating it can be to have the update repeatedly reach 99% and then fail, especially after several attempts.

At this point, I recommend that you review and try the steps provided in the AI generated answer on your thread. That reply typically include the most relevant checks for this scenario.

In the meantime, please try the following:

Disconnect any non-essential external devices.
Make sure the system drive has sufficient free space.
Open Command Prompt as administrator and run: DISM /Online /Cleanup-Image /RestoreHealth and sfc /scannow
Restart the PC when both scans finish, then check for the update again.

If the installation continues to fail at 99%, I recommend submitting a report through the Feedback Hub under Install and Update > Downloading, installing, and configuring Windows Update this can provide the Windows Insider team with useful diagnostic information. Thank you so much for your understanding.

Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.

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1 additional answer

Your answer

Ir. Dr. P.M. Kalai Vaanan Maniam 20 Reputation points

2026-08-13T04:14:16.5233333+00:00

Thanks Vikki-T... appreciate for the kind support and its work well. Manage to update accordingly. Regards
Vikki-T 8,550 Reputation points Microsoft External Staff Moderator

2026-08-13T13:01:32.6833333+00:00

Hi Ir. Dr. P.M. Kalai Vaanan Maniam,

Thank you so much for the update, and I'm truly very happy to hear back from you.

If you ever have any other questions or run into anything in the future, please feel free to post your question on the Microsoft Q&A Forum anytime. I’ll always be here and ready to assist you.

Wishing you a great experience ahead!

Answer 1

When Windows Update repeatedly fails near 99%, the supported troubleshooting path is to rule out background interference, driver issues, corrupted update files, and disk/system file problems.

Try these steps in order:

Run the Windows Update troubleshooter
- Go to Start > Settings > System > Troubleshoot > Other troubleshooters.
- Find Windows Update and select Run.
Restart the PC and try the update again
- A restart can clear processes that are blocking the install.
- If Windows Update is stuck between 51% and 99%, checking for updates again after restart is a recommended step.
Disconnect non-essential external devices
- Leave only the mouse, keyboard, and display connected.
- This is recommended for update/install failures that can be caused by device or driver issues.
Temporarily uninstall third-party antivirus or antispyware
- Security software can interfere with Windows 11 upgrades.
- Warning: Make sure the reinstall method and any product keys are available before removing it.
Check Device Manager for driver problems
- Search for Device Manager from the taskbar.
- Look for devices with a yellow exclamation mark.
- Right-click the device and choose Update Driver Software or Uninstall.
Do a clean boot, then retry the update
- A background process can cause setup to terminate unexpectedly.
- Use the clean boot procedure from Microsoft support, then run Windows Update again.
Repair the hard drive
- Open Command Prompt as administrator.
- Run:
```
     chkdsk /f C:
```
- Restart when prompted.
- Warning: This requires administrator permissions and may require a reboot before the scan completes.
Repair system files
- Open Command Prompt as administrator.
- Run:
```
     DISM.exe /Online /Cleanup-image /Restorehealth
```
- Then try the update again.
Reset Windows Update cache/components
- Open Command Prompt as administrator.
- Run these commands 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 after the commands finish.
- Warning: Microsoft recommends these command-line steps only if comfortable using Command Prompt, and they require administrator permissions.
Check free disk space and internet stability

Windows needs at least 16 GB free for a 32-bit OS or 20 GB for a 64-bit OS to upgrade.
If the install is interrupted, unstable connectivity can also contribute to failures.

If the failure is being caused by an Insider-specific update path issue, one Microsoft Q&A accepted answer for Dev Channel build 26300 states that the device should be offered 26300.9032 to update the expiry. If the update still continues to fail after the steps above, contacting Microsoft support is the supported next step.