How to Fix Windows Defender Antivirus Error 577?
To resolve the Windows Defender Antivirus Error 577 problem, carry out the troubleshooting steps mentioned below.
- Try to download the PC Repair tool from the manufacturer website.
- Install and launch the PC Repair tool on your computer.
- Click the Start Scan button to start the scanning process.
- Once the problem is detected, click the Repair All button.
- This will resolve the Windows Defender Antivirus Error 577 problem. If the issue remains unresolved, follow the instructions given here.
- You can switch to a third-party antivirus software instead of using the built-in antivirus program, i.e., Windows Defender on the Windows computer.
- The Windows Defender antivirus program offers only basic protection and it lacks some advanced features to protect the computer.
Registry:
- Hold the Win and R keys together on the computer’s keyboard.
- The Run dialog box will appear on the screen.
- Once you type ‘regedit’ in the Open field, select the OK option.
- As soon as the Registry Editor window appears, go to the ‘HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows Defender’ key on the left panel.
- On the main panel, find the DisableAntiSpyware option and select it.
- Change the value from o to 1 in the Value Data field and click the OK button.
- Likewise, change the value for DisableAntivirus.
- Exit the Registry Editor window and navigate to the C:\Program Files\Windows Defender location.
- Run the MSASCui.exe file.
Removing the Third-party Antivirus Program
- The built-in Windows Defender antivirus program will not work properly if you have installed any third-party antivirus on the Windows computer.
- Because, the third-party antivirus will interfere with the Windows Defender program.
- Try to remove or uninstall the installed third-party antivirus software from the Windows computer.
Notification Center:
- Enable the Windows Defender antivirus from the notification center.
- Navigate to the notification center at the lower-right corner of the screen.
- If you see the alert message, click it. Now, the Windows Defender Antivirus Error 577 will be turned on.
Security Permissions:
- Before you proceed with the following instructions, create a registry backup.
- Launch the Registry Editor dialog window and search for the ‘HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows Defender’ key on the right panel.
- Right-click this key and select the Permissions option.
- Click the Advanced button followed by the Add button.
- After you click the Select a principal option, fill both the Object Name and Username fields and click the Check Names button.
- Confirm that the entered username is correct, click the OK button.
- Once you check the Full Control field, click OK -> Enable Inheritance -> Apply -> OK.
Restarting the Windows Defender Service:
- Enter ‘services.msc’ in the Run dialog box.
- Note: The Run dialog box can be launched by holding the Win and R keys at the same time.
- Search for the Security Center service, right-click it, and select the Restart option.
- Go to the Services window, find the Windows Defender service, and select the Start option.
- Now, both the Security Center and Windows Defender service will start.
- If the Windows Defender 577 problem persists, create a user account.
- If required, contact our technical support members by clicking the Call button mentioned below to get remote assistance in resolving the Windows Defender Antivirus Error 577 problem.