Is Windows 11 Update stuck downloading at 0%, installing at 99%, or showing 100% without finishing? The fix depends on whether Windows is still working in the background, whether the download has stalled, or whether an installation failed. Try the safest methods first and move on to advanced repair only when necessary.
Quick fix: Give the update reasonable time to complete, restart safely from the desktop if possible, check your internet and disk space, and run the Windows Update troubleshooter. For persistent failures, repair Windows with DISM and SFC before resetting update components.
Why does Windows 11 Update get stuck?
Common causes include interrupted downloads, insufficient storage, stalled update services, system-file corruption, incompatible drivers, restrictive VPN/proxy settings or a large installation that simply needs more time. An apparently static percentage does not always mean Windows has frozen.
10 ways to fix Windows 11 Update stuck at 0%, 99%, or 100%
1. Determine whether Windows Update is genuinely stuck
When updates are installing, the percentage can remain unchanged for a while even while the computer works. Keep the device plugged in, wait if the drive is active and allow extra time for large feature updates. Do not force power off during a firmware update or when Windows is actively applying system changes. If there is no activity for an unusually long time, record the message and percentage before troubleshooting.
2. Restart Windows safely and retry
If you can still access the Windows desktop, save your work and choose Start → Power → Restart. Then open Settings → Windows Update → Check for updates. If the machine is on an installation screen and clearly progressing, leave it alone rather than interrupting it. If an update repeatedly fails, note the update KB number under Update history.
3. Check the internet connection and VPN
Open Settings → Network & internet and confirm you are connected. Try a trustworthy alternate network if downloads stall at 0%. Temporarily disconnect VPN or proxy software if your organization’s policies allow it. For managed work devices, contact IT rather than bypassing required enterprise networking controls. For more network help, see Windows 11 Wi-Fi connected but no internet.
4. Free up space on the system drive
Check storage in Windows 11: Open Settings → System → Storage to see free space before retrying the update.
Go to Settings → System → Storage and review available disk space. Use Temporary files carefully; do not select Downloads or Recycle Bin content without reviewing it. Big version upgrades can need substantial additional space. Follow our guide to finding large files and freeing Windows 11 disk space if necessary.
5. Run the built-in Windows Update troubleshooter
On current Windows 11 builds, start with the automated Windows Update troubleshooter in Get Help. You can also try Settings → System → Troubleshoot → Other troubleshooters → Windows Update → Run where that option appears. Follow the prompts, restart Windows if requested, and retry the update. Menu names can vary slightly by Windows build.
6. Check date, time, and update history
Open Settings → Time & language → Date & time; turn on automatic time and use Sync now when appropriate. Open Settings → Windows Update → Update history to identify the failing KB update or any error code, such as 0x80070005 or 0x80070570. Search for that exact code in Microsoft’s support information before changing system components.
7. Repair the Windows component store with DISM and SFC
Open Windows Terminal (Admin) or Command Prompt (Admin). Run the first command and let it complete; then run the second command. Do not close the terminal while repair is in progress.
DISM /Online /Cleanup-Image /RestoreHealth
sfc /scannowRestart Windows after repair and retry the update. If DISM reports it cannot find source files, consult Microsoft’s repair-source instructions before attempting more invasive changes.
8. Reset Windows Update’s download cache (advanced)
If earlier methods have failed, back up important files and create a recovery point first. Open Command Prompt as administrator, close Windows Update windows, then enter these commands in order:
net stop wuauserv
net stop bits
net stop cryptsvc
ren %windir%\SoftwareDistribution SoftwareDistribution.old
ren %windir%\System32\catroot2 catroot2.old
net start cryptsvc
net start bits
net start wuauservRestart the PC and check for updates. The first run may rebuild its download history/cache; it does not normally remove already installed updates. Do not run these commands blindly on managed devices or when servicing operations are actively in progress. A service may report it was not started; an existing .old folder may require an alternative backup name. See Microsoft’s documented component reset.
9. Install the failed KB update manually when appropriate
If Update history identifies a specific monthly cumulative update, check the matching architecture and version in the official Microsoft Update Catalog. Download only an applicable package for your installed Windows 11 release, and follow Microsoft guidance. Do not use random third-party update installers. This step is usually not suitable for a failed major version upgrade.
10. Use Windows 11 recovery or a repair reinstall as a last resort
If you can still boot Windows, look under Settings → System → Recovery for supported repair options. On compatible builds, Fix problems using Windows Update → Reinstall now may reinstall the current Windows version while preserving applications, files and settings. Back up your files anyway, keep BitLocker recovery information available, and follow organizational IT policy. If the device is stuck in a boot loop, use Windows Recovery Environment and its repair options rather than continuously hard-resetting the PC.
What to do for each stuck percentage
| Where it stops | Try first |
|---|---|
| Downloading 0% | Network connection, troubleshooter, restart |
| Downloading 99–100% | Wait, verify free space, retry |
| Installing 99–100% | Allow extra time, avoid forced shutdown, review update history afterward |
| Fails with an error code | Research that exact code, DISM/SFC and targeted update repair |
| Boot loop after update | Windows Recovery Environment or IT support |
Frequently asked questions
Should I turn off my PC when Windows Update is at 100%?
Not while it is actively installing or updating firmware. If Windows is accessible, use the normal Restart option. For prolonged frozen boot/install screens, consult device-specific recovery guidance before forcing a shutdown.
Will resetting Windows Update delete personal files?
Renaming the update cache folders normally leaves your documents alone, but administrative repair always carries some risk. Back up important files and do not reset the update components during an active install.
Does 99% always mean Windows Update failed?
No. Windows may be verifying, staging or installing update components even when the percentage does not visibly change.
Related ElMajdal tutorials
- How to fix Windows Update problems in Windows 10
- Find large files and free up disk space in Windows 11
- Windows 11 Wi-Fi connected but no internet
Official Microsoft references
- Troubleshoot problems updating Windows
- Windows Update troubleshooter
- Windows Update components: advanced reset instructions
Illustration note: the flowchart is an instructional diagram, not an actual screenshot. Screenshots of Windows screens should be added only when captured from a genuine Windows 11 device.