Windows Defender Error 577 in Windows 10

Windows Defender Error 577 in Windows 10

Windows Defender Error 577 in Windows 10 – Are you facing Windows Defender Error 577 in Windows 10? Windows Error 577 may be caused by security permissions issues. To resolve the error, you can read this blog and how to fix it.

Windows Defender is a popular anti-malware component that protects your system against malware infections. Over time, users often raise certain issues. Many users have regularly encountered Windows Defender Error 577 with Windows Defender. At this point, you may receive an error message: “Windows cannot verify the digital signature of your file.” Therefore, if you have trouble solving it yourself, we recommend that you follow the steps below and get rid of it immediately.

Table of Contents

Windows Defender Error Code 577 can happen because of the following reasons:

  • When you’ve installed any third-party antivirus software in your apparatus.
  • Furthermore, the damaged system files are just another variable with this error code.
  • Incomplete setup of Windows and .dll registration issues will also be causing this matter.
  • After understanding the motives behind the error code, today, have a look at the answers so as to get rid of the issue.

Following steps to Fix Windows Defender Error 577 in Windows 10

Windows Defender Error 577 in Windows 10

Solution 1: Uninstall third-party anti-malware

This concerns antivirus programs mostly, but other security software, like some anti-spyware, have been reported to cause Windows Defender error 577, too.

  • Press Windows key + X
  • Select Control Panel => Programs => Programs and Features.
  • Look for the AV, highlight it, and click Uninstall.
  • Reboot and try to launch Win Defender.

If error 577 has not been eliminated, the antivirus has probably not been completely removed. Find and delete any remaining files, folders, registry settings associated with it, or use an application removal tool. Revo Uninstaller is one of these tools, and you can find more in a Microsoft community.

Solution 2: Launch Defender via Services

  • Click Start.
  • Type ms and press Enter.
  • Locate Windows Defender Service in the table, right-click on it and click Start.

Solution 3: Run System File Checker to restore corrupted system files

  • Press Windows key + X
  • Click Command Prompt (Admin).
  • Type sfc /scannow and hit Enter.
  • Wait until the process completes.
    If some bad files have been detected but could not be restored, type dism / Online / Cleanup-Image / restore health and press Enter (this step requires an active Internet connection to access Microsoft servers). Wait until the end of the procedure and repeat step 3.
  • Exit Command prompt, reboot the PC.

Solution 4: Change the security permissions in your Registry

Windows Error 577 may be caused by security permissions issues. To resolve the problem, you can change the security permissions of specific keys in the registry. To do this, follow the steps below.

  • Open Registry Editor.
  • Navigate to HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows Defender
  • Right-click on the key and select Permissions
  • Choose the Advanced
  • Click on the Add
  • Choose Select a principal.
  • In the Enter the object name to select field type in a user name and click Check Names.
  • Select OK to save changes.

You can see your username in the Principal in the Basic permissions section tick the box on Full Control and click OK to save changes.

  • Choose Enable Inheritance
  • Click Apply and OK.

Solution 5: Restart Security Center and Windows Defender service

In some cases, the Windows Defender 577 error can be resolved by restarting Security Center. To restart Security Center, follow the instructions.

  • Press Windows + R.
  • Type msc, then press Enter.
  • Search for Security Center
  • Right-click on it and select Restart.

Windows Defender Error 577 in Windows 10

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Tags: Resolve Windows Defender Error 577, Webroot Service Error 577, Windows Defender Antivirus Error 577, Windows Defender Issues