How to fix 2026-03 KB5086672 26200.8117 please!

As it is windows 11 you can try the recovery option in settings.

Settings > System > Recovery > Fix problems using windows update, select Reinstall now. Once completed check the update again.

Hi, I'm Bernard, a fellow Windows user. I'm happy to help!

Just to confirm, can you still use the affected device? If yes, can you please check the System logs on the PC so I can further examine the root cause of the issue?

To share the System logs, please follow the steps in the link below:

Press the Windows key + X, then select "Event Viewer"

Click the drop-down of "Windows logs"

Right-click System > click Filter Current logs > Check: Critical, Warning, and Error > Hit OK

On the right pane, click "Save Filtered Log File As..."

Save the System logs file to your desktop and share it by following the steps from the link:

https://support.microsoft.com/en-us/office/share-onedrive-files-and-folders-9fcc2f7d-de0c-4cec-93b0-a82024800c07

Note: You can also use your preferred cloud storage to upload and share the logs.

The update failure with black or corrupted (pixelated) screens during installation is consistent with known Windows update issues that can cause temporary black screens or failed boots. Use the following sequence to stabilize the system and then let Windows move on to a later update if needed.

1. Let the black screen sit

• When the screen goes black during an update, wait at least 20 minutes before forcing a restart. Interrupting an update too early can corrupt the installation.

2. Restart safely after a failed update

• If the device appears frozen for more than 20 minutes:
  • Select Start > Power > Restart (or Update and restart) if the UI is still usable.
  • If the system is unresponsive, perform a forced restart:
    1. Select Start > Power > Shut down and wait for it to turn off, or hold the power button until it shuts down.
    2. Then press and hold the power button for 20 seconds. If the logo appears, keep holding until it appears a second time.
  • After restart, sign in and let Windows finish any pending configuration, then try Windows Update again once.

3. Run the Windows Update troubleshooter

• In Windows 11:
  1. Select Start > Settings > System.
  2. Select Troubleshoot > Other troubleshooters.
  3. Locate Windows Update and select Run.
  4. Apply any fixes it suggests, then restart and try the update again.

4. Check for driver conflicts (especially display/graphics)

• Display driver problems can cause pixelation and black screens during updates.
• Update or reinstall graphics drivers:
  1. Open Device Manager.
  2. Expand Display adapters.
  3. Right‑click the display adapter and choose Update driver > Search automatically for drivers.
  4. If problems persist, you can uninstall the display adapter (right‑click > Uninstall device) and restart so Windows reinstalls a clean driver.
• Also ensure Network adapters and other critical drivers are up to date using the same Update driver steps.

5. Perform a clean boot and retry the update

• Third‑party services or drivers can interfere with Windows Update.
• Perform a clean boot (disable non‑essential startup programs and services), then run Windows Update again. This reduces conflicts during installation.

6. If the specific build keeps failing, pause and wait for a newer build

• For Insider/preview or problematic cumulative updates that repeatedly fail at the same percentage and roll back, it is acceptable to:
  • Pause updates for a while and wait for the next build or cumulative update that may contain a fix.
  • Continue using the current build if it is stable.

7. If the system becomes unbootable or stuck in a loop

• If a future attempt leaves the PC stuck at a failed update screen or repeated rollback:
  1. Boot into Windows Recovery Environment (WinRE) by interrupting startup three times (power on, wait for logo, then hold power to turn off; repeat 3×).
  2. On Automatic Repair, choose Advanced options.
  3. Try Startup Repair first.
  4. If needed, use System Restore to roll back to a restore point before the failing update.
  5. As a last resort, use Reset this PC > Keep my files to reinstall Windows while preserving personal files.

If the device runs normally on the current build and only this one update fails after these steps, keep backups of important data and allow Windows to offer a newer update; do not repeatedly force the same failing build if it consistently rolls back.

References:

• Troubleshoot problems updating Windows
• Trouble installing Surface updates?
• Install Surface updates manually
• Black screen when Windows 10 restarts after a Windows update on some OEM factory-imaged devices