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.
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.
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.
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:
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.

Error code 0x80070005 is also known as the “Access Denied” error code because it prevents Windows users from accessing updates on their machines. This error code exists due to a lack of permissions on one’s system files or registry, permissions which are necessary for the updates via Windows Update to complete successfully. Error code 0x80070005 affects multiple versions of the Windows operating system including Windows 8, 8.1, and Windows 10.
Error CausesThe lack of files or registry permissions which result in the presence of error code 0x80070005 on your device may occur based on several reasons. The most common of these relates to the existence of malware programs on your machine. Malware can disrupt and change system files which are required for the update process to occur. Thus, this error code requires a systematic approach to first find missing or corrupt files, as well as cleaning up malware programs that could be preventing your machine from accessing updates.
Windows 10 users can repair error code 0x80070005 by implementing manual repair procedures. These procedures include the installation of tools like SubInACL.exe which enable users to access information about registry keys and files, thus detecting issues that may be preventing them from completing the update process in Windows Update.
These manual repair methods are listed below with clear instructions that even average Windows users can understand and follow. However, if you attempt the procedures and experience any issues that prevent you from successfully fixing error code 0x80070005, contact a Windows repair technician. Also, consider downloading an automated tool since these tools often help users fix PC performance issues that cause error codes to occur within various versions of the Windows operating system.
By logging on as an administrator, Windows users may be able to access updates via Windows Update and thereby fix error code 0x80070005 in Windows 10. Follow the steps below to complete this manual repair method.
Once you are logged on as an administrator, go to Settings to access Windows Update. You will be given the option to install the latest updates. Select this option and wait for the process to be completed. If error code 0x80070005 reoccurs, however, you will need to proceed to manual repair method two which requires that you scan for malware.
This method is very simple. As you scan for malware on your machine, you will be able to detect any malicious programs that may be preventing you from installing updates on your device. This will in turn enable Windows users to clean up their system, fix the error code, and prevent others from occurring.
First, be sure you have a viable antimalware program on your machine. Scan for viruses and other harmful programs using this third-party software. Another option is to run Windows Defender on your machine.
Once you’ve completed the scan and error Code 0x80070005 moved any malware that may be present, attempt to install updates via Windows Update. If the problem causing error code 0x80070005 in Windows 10 is resolved, you will be able to install the updates. However, proceed to the next manual repair method if the error code remains on your device after you have scanned and removed malware programs.
The SubInACL tool enables Windows users to access security details and other information regarding files and registry permissions. Use this tool to fix files and registry permissions by following the instructions below.
Once you’ve been able to run the SubInACL tool and fix files or registry permissions, your machine should be able to access updates. If error code 0x80070005 reoccurs, however, you may need to contact a Windows repair technician to verify if issues unrelated to permissions are causing the error code to occur.
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