How to fix
Windows update error 0x800f084f
on Windows

Hello. Every time I try to update my Windows 10 computer, the updates fail and I receive the 0x800f084f error. What does it mean?

Updating your Windows computer is one of the main things users should do to keep it secure, and bug-free. Windows updates sometimes include important security patches and new features. However, even when users click the "Install Updates" button, they can fail. Some people have been struggling to update their Windows systems and receive the error code 0x800f084f.

Windows updates are sometimes unable to install for various reasons and there are usually no specific causes that can be identified just from the error. Windows update error 0x800f084f could appear because of system file corruption, Windows update service glitches, or third-party software interference. If you have an antivirus program installed, we recommend trying to remove it as at times it can perceive legitimate Windows files as not secure.

The update error may also appear because of accidentally deleted files from the registry. More often than you might think users mess with system files and delete things that are required by Windows to run properly. In this guide, you will find 6 methods that could help you fix the 0x800f084f error. For some people, simply running an update troubleshooter fixes the issue. We also provided instructions on how you can download the updates manually if none of the other steps would work.

If you do not want to go through a lengthy troubleshooting process yourself, we recommend a repair tool [d1] that can fix various Windows errors, registry[ref en-1] issues, corrupted files, BSoDs[ref en-2] automatically. It will also clear your browsers from cookies and cache[ref en-3] so you should notice an improvement in performance. Otherwise, if you want to solve the Windows update error 0x800f084f manually, you can follow our guide posted below. Make sure to follow the steps correctly.

Method 1. Run the Update Troubleshooter

• Press the Windows + X keys and go to Settings
• Go to Update and Security
• Click Troubleshooter
• Select Additional troubleshooters

• Run the Update troubleshooter
• Restart

Method 2. Repair Corrupted System Files

Use Command Prompt commands to repair system file corruption:

• Open Command Prompt as administrator
• Use the following command and press Enter:
  sfc /scannow

• Reboot your system
• If SFC returned an error, then use the following command lines, pressing Enter after each:
  DISM /Online /Cleanup-Image /CheckHealth
  DISM /Online /Cleanup-Image /ScanHealth
  DISM /Online /Cleanup-Image /RestoreHealth

Method 3. Reset every Windows Update Component

• Open Command Prompt as administrator again
• Copy and paste the following commands, pressing Enter after each:
  net stop bits
  net stop wuauserv
  net stop appidsvc
  net stop cryptsvc
  Del “%ALLUSERSPROFILE%\\Application Data\\Microsoft\\Network\\Downloader\\*.*”
  rmdir %systemroot%\\SoftwareDistribution /S /Q
  rmdir %systemroot%\\system32\\catroot2 /S /Q
  regsvr32.exe /s atl.dll
  regsvr32.exe /s urlmon.dll
  regsvr32.exe /s mshtml.dll
  netsh winsock reset
  netsh winsock reset proxy
  net start bits
  net start wuauserv
  net start appidsvc
  net start cryptsvc

• Restart your PC

Method 4. Reset Windows Update Service

• Open Command Prompt as administrator again
• Copy and paste the following commands, pressing Enter after each:
  net stop wuauserv
  net stop cryptSvc
  net stop bits
  net stop msiserver
  Ren C:\\Windows\\SoftwareDistribution SoftwareDistribution.old
  Ren C:\\Windows\\System32\\catroot2 Catroot2.old
  net start wuauserv
  net start cryptSvc
  net start bits
  net start msiserver

• Restart your PC

Method 5. Download the Updates Manually

Whenever Windows updates fail to install automatically, you can always try doing it manually. First, you need to find out which KB number is relevant to you.

• Right-click Start button and pick Settings
• Go to Update & Security
• On the right, locate and click View update history

• From the list, note the KB number that fails to install with the error code
• Go to Microsoft Update Catalog page, type in the KB number and press Search
• Download the update and install it manually

(Note: if you are dealing with a Windows upgrade issue, make sure you also download KB4498524 and KB4515384 updates as well)

Method 6. Update via Media Creation Tool

• Download Windows 10 installation media from the official website
• Open the tool once it installed
• Agree to license terms
• Choose Upgrade this PC now

• Wait for the update to be installed