Windows Defender Update error 0x8050800c [FIX]

By: Madeleine Dean
2 minute read

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Installing the latest Windows Defender updates helps you to keep your computer safe. Usually, Windows will automatically download and install updates once a day for you. You can also download the latest updates manually.

However, there are instances when users can’t install the latest Windows Defender updates due to various error messages.

Windows Defender error 0x8050800c

Error 0x8050800c is one of the most frequent Windows Defender errors.

I am getting this error whenever I want to update the virus definition in Windows Defender. Sometimes the defender itself automatically turns off. […] The error code I am getting is: 0*8050800c. What should I do? I am using Windows 10.

If you’re experiencing error 0x8050800c, follow the instructions listed below.

Fix: Windows Defender Update error 0x8050800c

1. Restart your computer and then download and install the latest Windows Defender updates.

Users report that a simple action such as rebooting your computer eliminates error 0x8050800c and allows you to update your antivirus.

2. Install the latest Windows Updates 

If there are any pending Windows updates, install them first and then try to update Windows Defender. Many users confirm that this simple action solves the majority of Windows Defender Update errors.


For various PC problems, we recommend this tool.

This software will repair common computer errors, protect you from file loss, malware, hardware failure and optimize your PC for maximum performance. Fix PC issues now in 3 easy steps:

  1. Download this PC Repair Tool rated "Excellent" on TrustPilot.com.
  2. Click “Start Scan” to find Windows issues that could be causing PC problems.
  3. Click “Repair All” to fix all issues with Patended Technologies (requires upgrade).

Once you’ve installed the latest OS updates, restart your computer and try to update your antivirus.

3. Make sure you’re not running a third-party antivirus

If you’ve installed another antivirus program on your computer, this may explain why you can’t update Windows Defender. Uninstall the third-party antivirus solution and use a software removal tool as well.

4. Clean your registry

If your system files are corrupted, Windows Defender may not be able to download and install the latest updates. If you want to quickly scan and repair your registry, install one of these registry cleaners on your computer.

We hope the 4 solutions listed above helped you to fix Windows Defender’s update issues. If you’ve come across other workarounds to fix error 0x8050800c, feel free to list the troubleshooting steps in the comment section below.

RELATED STORIES YOU NEED TO CHECK OUT:

For various PC problems, we recommend this tool.

This software will repair common computer errors, protect you from file loss, malware, hardware failure and optimize your PC for maximum performance. Fix PC issues now in 3 easy steps:

  1. Download this PC Repair Tool rated "Excellent" on TrustPilot.com.
  2. Click “Start Scan” to find Windows issues that could be causing PC problems.
  3. Click “Repair All” to fix all issues with Patended Technologies (requires upgrade).

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