How to Fix Windows Defender error code 0x80073afc in Windows 10

If you receive an error code of “0x80073afc” in Windows Defender after you boot your Windows 10 computer or when you try to manually run Windows Defender, then it could be that the Windows Defender files are corrupted. In such cases, this error could also occur if there is third-party security software that interferes with the smooth functioning of this Microsoft Security Client.

If you are one of the users who are currently facing this issue, then here are some suggestions you can check out to resolve the Windows Defender error code 0x80073afc.

Option 1 – Try to check the status of all the Windows Defender-related services

  • In the Cortana search box, type “services” and click on the Services icon to open the Services Manager. Alternatively, you can also tap the Win + R keys to launch the Run prompt and then type “msc” in the field and hit Enter to open the Services Manager
  • After opening the Services Manager, look for the following services and make sure that their Startup type is set to their default values:
    • Windows Defender Advanced Threat Protection Service – Manual
    • Windows Defender Antivirus Network Inspection Service – Manual
    • Windows Defender Antivirus Service – Manual
    • Windows Defender Firewall Service – Automatic
  • You can right-click on each one of the listed services and then select Start to start them.
  • And if some of the services don’t have their default values, just double-click on the Services to change the Startup types and select the correct option from the drop-down menu of the Startup type under the Properties box.
  • Next, set up the Startup type of these services to Automatic and then click on the Start button if the services are not running yet.
  • Now click on the Apply and OK buttons to save the changes made and then see if it fixed the problem or not.

Option 2 – Try to re-register the concerned DLL files

You could also try to re-register some Dynamic Link Library or DLL files on your computer as this could also help in fixing the Windows Defender error.

  • In the Start search, type “cmd” and from the search results that appear, right-click on Command Prompt and select the “Run as administrator” option from the context menu.
  • After opening Command Prompt as admin, type the following commands one after the other:
    • regsvr32 dll
    • regsvr32 dll
    • regsvr32 dll
    • regsvr32 dll
  • Once you’ve entered the commands given above, it will re-register the concerned DLL files in your system.
  • Now restart your computer for the changes to take effect.

Option 3 – Try to use the Registry Editor

  • Tap the Win + R keys to open the Run dialog box,
  • Then type “Regedit” in the field and hit Enter to open the Registry Editor.
  • Afterward, navigate to this registry path: ComputerHKEY_LOCAL_MACHINESOFTWAREMicrosoftWindows NTCurrentVersionImage File Execution Options
  • Next, look for the DWORDs named “MSASCui.exe”, “MpCmdRun.exe”, “MpUXSrv.exe” and “msconfig.exe”.
  • If you can’t find these DWORDs, refer to the next given option below.
  • Restart your computer.

Option 4 – Check the Environmental Values

  • Type “View advanced system settings” in the Windows search box and select the appropriate result.
  • This will open a new mini window. From there, go to the Advanced tab and click on the “Environment Variables…” button located at the bottom part of the window.
  • Next, look for the “%ProgramData%” variable name and make sure that its value is set to C:/ProgramData.
  • Then click OK to save the changes made.

Option 5 – Run the System File Checker Scan

System File Checker or SFC is a built-in command utility that helps in restoring corrupted files as well as missing files. It replaces bad and corrupted system files to good system files. To run the SFC command, follow the steps given below.

  • Tap Win + R to launch Run.
  • Type in cmd in the field and tap Enter.
  • After opening Command Prompt, type in sfc /scannow

The command will start a system scan which will take a few whiles before it finishes. Once it’s done, you could get the following results:

  1. Windows Resource Protection did not find any integrity violations.
  2. Windows Resource Protection found corrupt files and successfully repaired them.
  3. Windows Resource Protection found corrupt files but was unable to fix some of them.
  • Restart your computer.

Option 6 – Perform a System Restore

Performing a System Restore on your computer can also help you fix the Windows Defender error. You can do this option either by booting into Safe Mode or in System Restore. If you are already in the Advanced Startup Options, just directly select System Restore and proceed with the next steps. And if you have just booted your PC into Safe Mode, refer to the steps below.

  • Tap the Win + R keys to open the Run dialog box.
  • After that, type in “sysdm.cpl” in the field and tap Enter.
  • Next, go to the System Protection tab then click the System Restore button. This will open a new window where you have to select your preferred System Restore point.
  • After that, follow the on-screen instructions to finish the process and then restart your computer and check if the problem is fixed or not.

Congratulations, you have just fixed the 0x80073afc error in Windows 10 all by yourself. If you would like to read more helpful articles and tips about various software and hardware visit errortools.com daily.

Now that’s how you fix the 0x80073afc error in Windows 10 on a computer. On the other hand, if your computer is going through some system-related issues that have to get fixed, there is a one-click solution known as Restoro you could check out to resolve them. This program is a useful tool that could repair corrupted registries and optimize your PC’s overall performance. Aside from that, it also cleans out your computer for any junk or corrupted files that help you eliminate any unwanted files from your system. This is basically a solution that’s within your grasp with just a click. It’s easy to use as it is user-friendly. For a complete set of instructions in downloading and using it, refer to the steps below

Perform a full system scan using Restoro. To do so, follow the instructions below.

  1. Download and install Restoro from the official site.
  2. Once the installation process is completed, run Restoro to perform a full system scan.
    restoro application screen
  3. After the scan is completed click the “Start Repair” button.
    restoro application screen
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