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➔Hi, in this video we will be showing you guys how to resolve the follow error: "How to Fix -Windows Defender Error 577 - Windows Could Not Start Windows Defender Service On Local Computer." ➔How to fix Windows Defender Error 577 on Windows 10 ➔Fix Windows Defender not Responding on Windows 10 ➔Error 577 Windows Defender Error We have mentioned 4 Methods in this Video to Fix Windows Defender Error 577: ➔Solution 1. Uninstall the Third-Party Antivirus Software ➔Solution 2. Change Registry ➔Solution 3. Restart Windows Defender Service ➔Solution 4. Run System Restore