A Windows 11 update stuck at the same percentage needs different checks depending on where it stopped. First identify whether you can still use the desktop or whether the PC is already restarting. The five checks below help you choose a suitable next step and collect useful details if the update fails again.
If the upgrade has never appeared, use our 25H2 not showing up guide. This article covers a download or installation that has already started. Before making repairs from a working desktop, back up important files.
Choose Your Starting Point
- 1. Identify the update stage
- 2. Check power and the connection
- 3. Review storage warnings
- 4. Run the Windows Update troubleshooter
- 5. Retry and check the result
1. Identify the Update Stage
Desktop and Settings still work: Open Settings → Windows Update. Note the update name, percentage, and whether it says downloading, installing, or restart required. A pending restart is a different state from a failed download. Save open work before using a restart option.
Full-screen update message during restart: Keep the PC powered and follow the message on screen. Desktop troubleshooting steps below cannot be used here. Do not interpret an unchanged percentage alone as permission to cut power. There is no single waiting time that proves every PC has frozen.
If the PC repeatedly fails to reach Windows, or returns to a recovery screen, record the exact message and use Microsoft’s recovery guidance or manufacturer support. Recovery choices depend on the symptom; some require a BitLocker recovery key. Avoid starting a reset without understanding its effect on files and apps.
2. Check Power and the Connection
For a download stalled in Settings, connect the laptop to power and check Settings → Network & internet. Reconnect Wi-Fi or Ethernet if disconnected. Try opening a familiar webpage to see whether general internet access works; this does not prove the update service itself is reachable.
Download duration varies with connection speed, network settings, and update size, as explained in Microsoft’s Windows Update FAQ. On a work or school PC, ask IT about managed update restrictions instead of changing organization settings.
3. Review Storage Warnings
If Windows reports insufficient space, open Settings → System → Storage → Cleanup recommendations. Review the selected files before cleaning up. Our storage cleanup guide explains what to check before deleting personal files.
Use the amount requested by Windows rather than assuming one free-space target fits every update. If Windows Update offers Fix issues for a storage shortage, it may guide you through using external storage. Back up that drive first; additional internal space may still be required. See Microsoft’s update storage instructions.
4. Run the Windows Update Troubleshooter
With Windows accessible, run the automated Windows Update troubleshooter in Get Help. Microsoft’s troubleshooter page provides the launch option and also lists Settings → System → Troubleshoot → Other troubleshooters → Windows Update → Run.
Follow the prompts and note any issue it reports. When it finishes, save work and restart normally. A completed troubleshooter does not itself confirm that the update installed; check the installation result next.
5. Retry and Check the Result
Return to Settings → Windows Update → Check for updates. Install available updates and complete a requested restart. Then open Update history and check the entry for the update you were troubleshooting, rather than relying only on the progress bar disappearing.
If it fails again, record the update name or KB number, exact error code, and whether failure happened before or during restart. Use those details with Microsoft’s update troubleshooting guidance. Avoid repeatedly retrying without checking what changed.
September 2026: Check the Symptom After Installation
Update checked September 11, 2026. A completed update followed by an app or desktop problem is different from an update that never finishes. Microsoft lists several fixes in KB5124008, released September 8 for Windows 11 24H2 and 25H2: background settings reverting to black, mouse customization resetting on non-English installations, and Teams or the new Outlook failing to launch on affected ARM-based PCs.
If Windows is usable, review Settings > Windows Update > Update history and install the latest update offered to your device. Record the installed KB number and remaining symptom. The release-health page gives the affected versions and resolution for each issue. These fixes do not establish that every download or installation error is resolved.
September 14 follow-up: remote desktop and USB audio
Checked September 22, 2026: Microsoft says the September 14 out-of-band update KB5129195 fixes Remote Desktop Services instability following the September security update. Symptoms can include dropped connections, sign-in trouble, and a Windows Update page that keeps loading. Windows 365 and Azure Virtual Desktop are not affected by this issue.
USB audio is only partly resolved. The same update fixes the documented 8-channel and 3D audio symptoms. Microsoft still lists other USB Audio Class 1.0 symptoms, including devices failing to start, as unresolved. Do not assume that every “no sound” problem has this cause or that this patch fixes them all.
Compare your Windows version, installed KB, and exact symptom with the official issue details. On an organization-managed PC, send those details to IT. An out-of-band update is an additional release outside the usual schedule; use the update appropriate for your device, rather than repeatedly retrying an unrelated installation.
Defender “turned off” notification: fix released
Updated September 21, 2026: Microsoft says the incorrect notification was resolved in Microsoft Defender Antivirus version 4.18.26080.4, released September 17. This update fixes a notification that appeared even while protection was active. It is separate from a Windows upgrade that will not download or install. See the official issue and resolution.
What to check: open Windows Security > Virus & threat protection and read the actual protection status. If protection is disabled, do not assume the message is this display issue. If the warning persists, use Microsoft or your IT team’s support route to check the installed Defender version and remaining symptoms.
When to Get More Help
If the same update still fails after these checks, share the recorded details and checks already tried with Microsoft or your PC manufacturer. If Windows signs in but the desktop stays blank, continue with our black screen after login guide. That symptom needs its own display and desktop checks.