How to Fix Windows Update Error code C80003fa
Error Code c80003fa is common for all Windows Operating systems when installing Windows updates. It usually appears when the Windows 10 or Windows 7 update system is broken or there are network-related glitches. The usual causes for this Windows Update Error c80003fa are communication failures over the internet with Microsoft update servers.

Solution 1: Run Windows Troubleshooter
Start by running the Windows Troubleshooter for Windows Update Error Code c80003fa.
If the issue persists, proceed to the next steps:
- Disable the proxy internet connection and try again to install the Windows update.
How to Disable a Proxy Connection:
- Open Internet Explorer and click on Tools → Internet Options.
Solution 2: Repair Windows Update Services
There could be failed Windows update services causing this error. To repair Windows update services, follow these steps:
- Open Command Prompt as Administrator by right-clicking on it.
- Go to
c:\windows\
and rename the “SoftwareDistribution” folder to “Old.” - If you cannot rename the folder, stop the Windows update services by running this command:
Net stop wuauserv
. - Once the service stops, rename the folder.
- Restart the Windows update service by running the command:
Net start wuauserv
. - Check for updates again.
Solution 3: Run SFC Scan to Fix Error Code c80003fa
The SFC Scan is a command-line tool that can help repair system file corruption that might be causing the update error.
- Open Command Prompt as Administrator.
- Type
SFC /SCANNOW
and press Enter.
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