Windows Defender Error Code

• Windows Defender will not work if the Microsoft Security Essentials is turned on. So, turn it off to rectify the issue.
• To do so, open the Microsoft Security Essentials on your system.
• From Settings, select the Real-Time Protection option.
• Untick the checkbox near the Turn on Real-Time Protection option available on the right pane.
• Click Save Changes and check if the error has been resolved.
• Update the system to the latest version to avoid this error.
• Go to Start and select the Control Panel option. Choose the System and Security option followed by the Windows Update option.

• Now, tap the Check for Updates option and wait till the update process is complete.
• If you have installed any other security or antivirus program, then disable it or uninstall it to clear this Windows Defender Error Code.
• Check if the firewall is turned on. In case there is an antivirus program and firewall installed on your system, then you have to turn on the firewall to Fix Windows Defender Error.
• Select the System & Security option from the control panel. Choose the Windows Firewall option.
• Tap the Windows Firewall ON button to enable the firewall on your system.

• The first step is to run the Windows Update Troubleshooter.
• To do so, press the Windows key. In the search box, key in Troubleshooter and tap the Enter button.
• Select the Troubleshooting option and then choose the View All option.
• Click the Windows Update troubleshooter and make use of the instructions that are displayed on your screen to rectify any errors.
• The second step is to reset the Windows Update Component.
• Press the Windows key and the X key simultaneously. Choose the Command Prompt option to open the prompt.
• You have to disable the BITS service, Windows Update Service, and the Cryptographic Service.
• For this, key in the following and tap enter after entering each command.
• et stop bits
• et stop wuauserv
• et stop appidsvc
• et stop cryptsvc

• Find the Software Distribution folder’ backup copies by entering the following commands:
• en%systemroot%\softwareDistributionSoftwareDitribution.bak
• en%systemroot%\system32\catroot2catroot2.bak
• Now, restart the Windows Defender Error Code services that were disabled in the first step by specifying:
• et start bits
• et start wuauserv
• et start appidsvc
• et start cryptsvc
• Restart your computer after you perform the following steps. Check if the error has been resolved.
• Next, check if the system file is corrupted. To sort out the issue, follow the forthcoming steps.
• Open the command prompt and type:
• ISM.exe/Online/Cleanup-image/Scanhealth
• ISM.exe/Online/Cleanup-image/Restorehealth.
• Restart the Windows system and check if the problem has been sorted out.

• First, install the update from the Defender itself.
• From the Start menu, select the Settings option.
• Choose the Update & Security option followed by the Windows Defender option.
• Find the Version Info section in the right pane and select the Open Windows Defender option to open the app on your system.
• Go to the Update section and click the Update option.
• Next, uninstall any third-party antivirus program that you have installed on your system.

• Uninstall the antivirus by navigating to the Control Panel and selecting the Programs and Features option.
• Search for the software you wish to uninstall and click the Uninstall option available near it to Fix Windows Defender Error.
• Else, you can download the removal tool available for each antivirus file and uninstall the program completely. Restart your computer after uninstalling the software.
• Check if you have granted the necessary permissions for the update process to take place. A few updates need administrative permissions, so make sure you are logged in with your administrator account.

Windows Defender Error 0x80070426

• Download the McAfee Consumer Products Removal Tool on your computer from the manufacturer's official site.
• Go to the computer's taskbar and close the non-essential applications that are running.
• Right-click the MCPR tool and choose the Run as administrator option. Wait until the application completes the process and then reboot the computer.
• Make Microsoft Internet Explorer as your system's default browser. To make this change, go to the Settings application and open System. Choose Default apps and then select the Web browser option. Select Internet Explorer.
• Navigate to the personal settings on the Internet Explorer and delete them. Press the Windows and X keys simultaneously. From the menu that is displayed, choose Control Panel.
• Type the word 'troubleshooter' and select Troubleshooting in search bar.
• Navigate to the System and Security option and choose Windows Updates.
• After performing these steps, reboot the computer and check whether Windows Defender works correctly. Also, ensure that the Update button on the Windows Defender software works.

Windows Defender Error 0x80070652

Follow these steps to fix the Windows Defender Error code 0x80070652.

• Log into the computer with the Administrator credentials and perform the steps given below.
• Go to the Start menu and type 'msconfig' in the search field. Select the System Configuration option from the search results.
• Choose the Service tab which is located on the System Configuration window.
• Navigate to the Hide all Microsoft services option and click on Disable all.
• Go to the 'Startup' tab and click it. Choose Open Task Manager.
• View the items on the Startup tab, click each of them and then disable them by clicking the Disable button.
• Click the X button on top of the Task Manager window to close it. Select OK from the System Configuration window. Restart the computer after performing these steps to solve the error.

• The Windows Defender error 577 occurs when the Windows Defender feature is disabled on your computer.
• This message also occurs when a third-party antivirus tool interferes with the Windows Defender antivirus tool.
• Proceed with the various solutions given below to rectify the error message on your computer.

Method 1

• If you have any problem with the Windows Defender, you can install the third-party software tool to prevent your computer from virus and malware.
• You are recommended to use Bitdefender Antivirus tool to provide excellent protection from virus, and malware & threat.
• The main advantage of using the Bitdefender antivirus tool is, it will not interfere with the Windows Defender tool, and is also compatible with Windows 10.

Method 2

• You can also fix this error by modifying the registry values. Before you change any registry value, make sure to create a backup of your registry.
• Do the next step to open the registry editor window on the screen.
• Press the Windows key and the R key simultaneously, type regedit in the Command prompt and then click the OK button. Now, the Registry Editor window will display on the screen.
• Click the Windows Defender option in the left panel of the screen.
• Select the DisableAntiSpyware option and change the Value Data from 0 to 1.
• Also, change the Value Data of DisableAntivirus from 0 to 1.
• After doing the necessary changes, click the OK button to save them.

Method 3

• If you use a third-party antivirus tool, try to delete the tool completely from your computer.
• Use the recommended tool to uninstall the third-party antivirus tool from your computer.
• Also, make sure to remove or delete the registry entries and files/folders related to the antivirus software tool.

Method 4

• Turn on the Windows Defender notification on your computer.
• Click the Notification Center icon on the bottom-right corner of the screen. Select the Flag icon next to the alert message that appears on the screen to turn on the notification.

Method 5

• Open the Registry Editor window and right-click the Windows Defender Error Code option on the left panel of the screen.
• Now, select the Permissions option from the list and then click the Advanced button.
• To check the username, click the Add button. Select the Select a principal feature and then click the Check Names button.
• Click the OK button if the username is correct.
• The Permission Entry for Windows Defender window will display on the screen. Checkmark the Full Control option under the Basic Permissions section and click OK.
• Select the Enable Interference button, click Apply, and then click the OK button to save the changes.

Method 6

• If you are not able to resolve the problem from the above solutions, restart your Windows Defender service to fix the issue.
• Open the Services window, right-click the Security Center option, and then select the Restart option.

• First, uninstall the third-party antivirus tool from your computer to avoid this error.
• Locate the following executable files like MpCmdRun.exe, MpUXSrv.exe, MSASCui.exe, and msconfig.exe on your system and also delete all these files or folders from the registry entries to rectify the error code 0x80073afc.
• Removing the problematic update from your Windows will also help you to solve the problem.

To remove the update, do the next step.

• Click the Settings app to open the settings window. Select the Update & Security section, click the Windows update option on the left panel of the screen, and click Advanced options.
• When the subsequent window opens, click the View your Update history option.
• Choose the update which you want to remove from your PC and select the Uninstall button to remove it.
• Use the third-party registry cleaner to clean the registry entries on Windows 10.

• Update the Windows Defender tool to the latest version. Wait for the update to fix the error. To check for the update availability, open the Settings window and click the Updates & Security option.
• Choose the restore point to restore your system files and settings to the default settings.
• Use any troubleshooting tools like SFC scan or DISM tool to fix the issue on Windows 10.
• Get the tool from the official website and use the appropriate commands in the command window to run the tool.
• It may take a few minutes to complete the process.
• Once you complete the process, close the command window and restart your computer.
• Locate the System Permissions tab and remove some inherent permissions which may block Windows Defender.
• Change the system permissions accordingly and click the OK button to save the changes made in the Security window.
• If the problem persists, restart the security service and also, try modifying the group policy in the group policy editor.

• There are four Windows Defender Error Code solutions to the problem specified here.
• First, uninstall any third-party antivirus installed on your system.
• Make use of the system uninstall option or the removal tool provided by the manufacturer of the program.
• Next, use the Registry Editor program to resolve the issue properly.
• Go to HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\WindowsNT\CurrentVersion\ImageFielExecutionOptions\. Find the ‘msseces.exe’ entry and delete it.
• Next, visit HKEY_CURRENT_USER\Software\Microsoft\Windows\Currentversion\Policies\Explorer\DisallowRun. Delete the ‘msseces.exe’ entry.
• Restart the system.
• Launch the command prompt window, key in ‘sfc/scannow’, and tap the Enter button.
• Install any pending updates for the computer.

• The initial solution to clean boot your Windows system. Press the Windows button and the R button together.
• Key in ‘msconfig’ and tap the Enter button. Choose the Services tab and highlight the checkbox near the Hide All Microsoft Services option.
• Tap the Disable All option.
• From the Startup tab, choose the Task Manager option. Right-click on each item displayed on the next page and select the Disable option.
• Exit from the Task Manager window by tapping the Close icon and click OK in the System Configuration window.
• After the reboot process is complete, check if the error has been resolved.
• Once the computer turns on, you have to open the Configuration window and modify all the settings to its default values. Only then, the computer will be able to function properly.
• Next, you have to check if the Windows Defender Advanced Threat Protection Service and the Windows Defender Network Inspection Service are enabled.
• To check the status of these services, open the Run dialog box and type services.msc. Launch the Windows Defender Service by double-clicking it.

• Locate the Startup Type option and check if it is set to Automatic. The service should be in the Started condition.
• Check if the system is infected by virus or malware. If so, the Windows Defender will be turned off. Enable the Windows Defender to resolve this issue.
• The final resort is to run the Deployment Image Servicing and Management tool. It will let you fix all the corrupt files.
• Press Windows key and the X key together. Launch the command prompt and key in:
• ism.exe/online/cleanup-image/Restorehealth. Press the Enter key.
• Perform a System File Checker(SFC) scan to find and delete any corrupted files.
• From the Start menu, search for cmd and right-click on it. Select the Run As Administrator option.
• Key in sfc/scannow option and tap Enter. Once the scan process is complete, open the SFCFix and press Enter when each prompt appears.
• It will scan your computer and fix all the corrupted Windows Defender Error Code files present in the Windows system.