Update to developer channel stuck at installing 99%

Question

The update installing in developer channel has 26300 has stuck by installing 99% .from beta channel..please tell me how to solve this issue

Answer 1

Hi,

Just to clarify, you're on Beta and

trying to update to Dev Channel?

Is your PC fully Windows 11 compatible?

Run: https://aka.ms/GetPCHealthCheckApp

Answer 2

Follow these steps to resolve an Insider build update stuck at 99%:

1. Wait at least a few hours
   • Insider builds, especially large Dev/Beta updates, can stay at high percentages (like 99%) for a long time while completing background tasks.
2. Restart the device
   • If it has been stuck at 99% for more than four hours, restart the PC once:
     • Select Start > Power > Restart.
   • After restart, go to Settings > Windows Update and check whether the build shows as installed or still pending.
3. If the upgrade assistant or setup is stuck at 99%
   • If using an upgrade assistant-like process and it is stuck at 99% for more than four hours, use this procedure:
     1. Right-click Start and select File Explorer.
     2. In the address bar, enter: C:\$GetCurrent and press Enter.
     3. Right-click the Media folder and select Copy.
        • If Media is not visible, in View > Show/hide, enable Hidden items.
     4. Right-click the Desktop and select Paste.
     5. Restart the device.
     6. Sign back in, right-click the Media folder on the Desktop and select Copy.
     7. Open File Explorer, go to C:\$GetCurrent again.
     8. Right-click in C:\$GetCurrent and select Paste.
     9. Open the Media folder in C:\$GetCurrent.
     10. Right-click Setup and select Open.
     11. When the upgrade restarts, on Get important updates, choose Not right now, then Next.
     12. Follow the prompts to complete the upgrade.
4. Run Windows Update again if it still fails
   • Open Settings > Windows Update > Check for updates and let it re-download/retry the build.
   • If Windows Update appears stuck between 51–99% again, run the Windows Update Troubleshooter as described in the context and then check for updates again.
5. After the build installs
   • Go to Settings > Windows Update and select Check for updates.
   • Install all available updates and restart, even if no restart is requested.

If the issue persists after these steps, further troubleshooting specific to Insider builds (such as leaving/rejoining the channel or using an ISO for an in-place upgrade) would be needed, which is not covered in the provided material.

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References:

• Windows 10 Upgrade Assistant is stuck at 99%
• Troubleshoot problems updating Windows