If your Windows 11 update is stuck at 0% or KB5079473 won’t install despite multiple restart attempts, you’re not alone. This is a common issue affecting thousands of Windows 11 users, especially with recent cumulative updates. Several users report, “Windows update stuck at downloading 0%.” Tried restarting the PC, but it didn’t resolve the issue. This can be annoying and prevent you from enjoying the new features and improvements that the update brings. Several factors, including Slow internet speed, corrupted system files, and insufficient disk space, cause Windows Update to get stuck installing. Whatever the reason, here are 7 tested solutions that have resolved this problem for most users. Most people solve this with the first 2-3 steps, but I’ve included advanced options if you need them.
Why is Windows 11 Update stuck downloading?
Before we jump to solutions, let’s first understand what’s going wrong. Why does Windows 11 update (including cumulative updates like KB5079473) get stuck or fail to install?
- Insufficient disk space: The update requires a certain amount of free space on your system drive to download and install. If you don’t have enough space, the update might fail or get stuck.
- Network issues: The update requires a stable, high-speed internet connection to download the files from Microsoft servers. If your network is slow, unstable, or disconnected, the update might not download properly or at all.
- Corrupted or missing system files: The update relies on some system files to run smoothly. If these files are corrupted or missing, the update might encounter errors or get stuck.
- Firewall or antivirus interference: Some security software may block or interfere with the update process, causing the update to stall or fail.
- Disabled or malfunctioning Windows Update services: The update requires some Windows Update services to be running in the background. If these services are disabled or not working properly, the update might not start or complete.
Quick Fix Checklist (Try These First)
If your Windows 11 update is stuck at 0% or seems frozen, try this fast checklist before deeper fixes:
- Restart your PC: A simple restart can clear temporary glitches with Windows Update services.
- Check your internet connection: Make sure you have a stable connection. Avoid updating over flaky Wi‑Fi or unstable mobile hotspots.
- Free up disk space: Keep at least 3-5 GB free on your system drive (C:). Remove temporary files or uninstall unused apps if needed.
- Pause and resume updates: Go to Settings → Windows Update → Pause for 1 week, then unpause to force Windows to refresh the update process.
- Disable VPN/antivirus temporarily: (they sometimes interfere with Windows Update)
If the update is still stuck, move on to the detailed fixes below.
Start Windows into clean boot state And check for Windows updates this will help if any third-party software conflict causes the issue.
Windows update is stuck due to slow internet
One possible reason Windows 11 KB5079473 is stuck at 0 percent is a slow or unstable internet connection. This can prevent the update from downloading properly or cause it to fail.
To check your internet speed, you can use a tool like Speedtest.net or Fast.com.
If you are connected to a Wi-Fi network, check the signal strength and switch to a wired connection or to a different Wi-Fi network.
Power cycling your router and modem can refresh your network connection. Unplug both devices, wait 10-15 seconds, then plug them back in. This process can help resolve issues related to network congestion or temporary glitches.
If you’re using a Virtual Private Network (VPN), disconnect from it temporarily. VPNs can sometimes introduce latency and affect download speeds. Check if disconnecting from the VPN improves the Windows update speed.
Check the Free space on (C) to download Windows updates
Sometimes, the update can get stuck due to insufficient space on your system partition. To free up disk space, you can use Disk Cleanup or delete unnecessary files or programs.
To use the Disk Cleanup tool, follow these steps:
- Press the Windows key + E on your keyboard to open File Explorer.
- Right-click on your Windows drive (usually C:) and select Properties.
- Click on Disk Cleanup under the General tab.
- Check the boxes of the files you want to delete, such as Temporary files, Recycle Bin, etc.
- Click on OK and confirm your choice.
In addition, move large files, such as videos or archives, to an external hard drive or cloud storage.
Go to Settings > Apps and uninstall any programs or applications that you no longer use.
Restart your PC and try to install the update again.
Restart Windows Update Service
If for some reason Windows Update or Background Intelligent Transfer Service (BITS) is stuck, the update may stuck download or never move past 0%. Restarting it often clears the stuck state and fix the issue for you.
- Press Windows Key + R to open the Run dialog
- Type: `services.msc` and press Enter
- Scroll down and find “Windows Update” in the list (they’re alphabetical)
- Right-click Windows Update and select Restart, wait 10 seconds for it to restart
- Now, locate “Background Intelligent Transfer Service” (abbreviated as “BITS”)
- Right-click on BITS and select Restart. Close the Services window and Restart your PC.
Now, go to Settings > System > Windows Update and click “Check for updates. Watch for the update to resume. If it does, let it continue. Check back in 15 minutes to confirm progress.
Why this works: These services often crash under load. A clean restart forces them to reload properly, and the update resumes from where it paused.
Run Windows Update Troubleshooter
This is one of the best solutions to use when you encounter Windows update download or installation issues. This built-in tool detects and fixes common issues with Windows Update.
- Press Windows + I to open Windows Settings.
- Go to the system, then troubleshoot and click on other troubleshooters
- Here, on the right-hand side, select Windows Update and click Run.
- Select the problem you are experiencing. I can’t download or install, and follow the on-screen instructions.
The troubleshooter will attempt to identify any issues that may prevent your computer from downloading and installing Windows Updates. If it detects any issues, the update troubleshooter attempts to resolve them.
Clear Windows Update Cache
This is the most effective solution for stuck updates. Windows stores temporary update files in a specific folder, C:\Windows\SoftwareDistribution\Download. Clearing this folder forces Windows to re-download fresh, uncorrupted copies.
Step 1: Stop Windows Update services
- Press the Windows key + X on your keyboard and select Command Prompt (Admin) or Windows PowerShell (Admin) from the menu.
- In the Command Prompt window, type the following commands one by one and press
net stop wuauserv
net stop bits
Alternatively, you can open Windows Services and stop the Windows Update Background Intelligent Transfer Service (BITS) service.
Step 2: Delete the SoftwareDistribution folder content
- Press Windows key + E to File Explorer and go to C:\Windows\SoftwareDistribution\Download
- Select ALL files (Ctrl + A) and Delete everything (Press Delete or right-click → Delete)
- If you see warnings about needing admin permission, click “Continue” for each one.
Note: Don’t worry about these files; these are temporary update files. Next time we check for Windows updates, download these files for fresh ones.
Again, open Command Prompt and run the commands “net start wuauserv” and “net start bits” to restart the Windows Update Service and Background Intelligent Transfer Service you previously stopped.
That’s all. Restart the Windows PC and check for updates. To do this
- Press Windows + X and select Settings.
- Click Update & Security, then Windows Update,
- Now, click the Check for updates button
Repair system files using SFC and DISM
As mentioned earlier, corrupted or missing system files can cause the update to get stuck. To fix this, you can use two tools: SFC (System File Checker) and DISM (Deployment Image Servicing and Management). These tools can automatically scan and repair system files.
- Open the Command Prompt as administrator
- Run the DISM command ” DISM /Online /Cleanup-Image /RestoreHealth.“
- This will start to repair the system image
Next, run sfc /scannow (System File Checker utility) to check and restore if any missing or corrupted system files are causing Windows Update to stuck downloading or installing.
What these do:
- sfc /scannow: Finds and repairs corrupted system files
- DISM /RestoreHealth: Repairs the Windows image itself, fixing deeper issues
Manually Install KB5079473 (When Downloads Get Stuck)
If your update keeps failing to download or install, you can bypass the download entirely and install it manually from Microsoft’s Update Catalog.
- Go to https://www.catalog.update.microsoft.com/Home.aspx
- In the search box, type: `KB5079473` Press Enter
- Look for the update that matches your Windows 11 version:
- You can find your version at Settings > System > About (look for “Version”
- For most users: look for the “Cumulative Update for Windows 11” entry
- Click the download link, a .msu file will download
After downloading, navigate to the file location. Right-click the .msu file and select Open. Click “Yes” when Windows Update Installer asks if you want to install.
Wait for installation, it may take 5 to 15 minutes depending on your PC configuration and restart Windows when it prompts.
Another solution is to disable or uninstall any third-party antivirus software on your PC. Some antivirus programs can interfere with the update process and cause Windows Update stuck Download.
Still need help? Use the official Update Assistant tool to upgrade to the Windows 11 24H2 update without issues. You can also download the Windows 11 25H2 ISO for a clean install.
Common Windows 11 Update Error Codes
Well, if you see error messages while download and instlal windows update, here’s what they mean and how to fix it.
- 0x80073712: This usually indicates missing or corrupted system files needed by the update. Running SFC and DISM, and resetting update components, is recommended.
- 0x800f0991: Typically a general update failure code. This can be due to component store corruption, third‑party antivirus interference, or partial downloads. reset update components help fix thie error.
- “We couldn’t complete the updates, undoing changes”: Windows tried to install the update but couldn’t finish, so it rolled back. This often appears when KB5079473 fails to install or when system files are damaged. To fix, clear the cache and ensure 3GB+ free disk space
- Update Stuck at 100%: Downloaded but won’t extract or finalize. Let it sit 30 minutes, then restart; if still stuck, try Clearing the update cache.
- Update Failed to Install: It’s a Generic failure cause due to multiple reasons. Running SFC and DISM, and resetting update components help.
How to Prevent Future Windows 11 Update Issues
To reduce the chances of Windows 11 updates getting stuck again:
- Keep enough free disk space: Try to maintain at least 10–20 GB free on the system drive. Delete old downloads, temp files, or move large files to external disk or cloud storage.
- Avoid forced shutdown during updates: Don’t power off your PC while it says “Installing updates” unless it’s clearly frozen for hours and you’ve tried everything.
- Install updates regularly: Skipping updates for months can make future cumulative updates bigger and more complex, increasing chances of failure.
- Uninstall problematic third‑party tools: Some antivirus or system “tune‑up” tools can interfere with updates. Temporarily disabling them may help.
- Create backups before major updates: Use System Restore or a full backup before big feature updates. This gives you a way back if something goes wrong.
Frequently Asked Questions
Usually one of five reasons: (1) Corrupted update files, (2) Windows Update service crash, (3) Not enough disk space, (4) Internet interruption, or (5) System file corruption.
Yes, but be careful. If you’ve waited less than 30 minutes, wait a bit longer. If truly frozen after 30+ minutes, a normal restart is safe. Avoid hard shutdowns (holding the power button). Press Ctrl+Alt+Delete, click Power icon, hold Shift, click Restart for a graceful shutdown.
It Depends on update size and internet speed:
– Small updates (100-300 MB): 5-15 minutes
– Medium updates (300-800 MB): 15-45 minutes
– Major updates (1-2 GB): 45+ minutes
– If it’s been 2 hours, it’s likely stuck.
Yes, but it’s not recommended. KB5079473 includes security patches. You can skip it, but you’ll be missing those protections. Microsoft usually releases a fixed version within 2-4 weeks if major bugs are reported.
No. The cache folder (C:\Windows\SoftwareDistribution) only contains temporary update files. Your personal files, photos, documents, and programs are completely safe.
Usually, do not uninstall, just disable it temporarily during the update. Go to your antivirus settings and disable real-time scanning for 1 hour. Re-enable after the update completes. This prevents conflicts without permanent changes.
Perform a system restart, run the update troubleshooter, or reset Windows Update components using Command Prompt. If problems persist, seek professional help or visit the Microsoft support website.
Disclaimer: This article is provided for informational purposes. While these are proven, tested fixes, results may vary based on system configuration. Always back up important files before major troubleshooting. If you’re uncomfortable with command-line tools, consider contacting Microsoft Support.