How to Fix Windows Defender Error 577?

by John Woods IT Expert

Microsoft Windows PC is free software that offers an extra line of defense against malicious and spyware software. Windows Defender scans the PC’s hard drive to search and eliminate a range of security threats, including viruses, spyware, and malicious software also known as malware. By removing these viruses, threats, Windows Defender speeds up the performance of the device and also avoids annoying pop-up ads that can ruin your experience of web browsing.

Other anti spyware and spyware software has started annoying. Due to better competition, each anti spyware is trying to outdo each other by not allowing others to run.

Windows could not start the Service of Windows Defender on the device

Windows cannot verify the digital signature for the folder or file. Recent software or hardware changes may have installed a file that is damaged or signed incorrectly from the unknown source.

The reason is that the value of the registry has been changed to disable turning on Windows Defender and your anti spyware is the most likely cause. Follow these steps:

  • First, uninstall any other anti spyware or antivirus you might have installed like Spybot Plus, Avast, Norton, McAfee, Comcast Complete Protection, etc.
  • Restart your device.
  • Go to regedit.exe and navigate to HKEY_LOCAL_MACHINE->SOFTWARE->Microsoft-Windows Defender.
  • You need to change it to 0 (zero) by having a right click and then changing and modify value data. If you are not able to change the value, you will have to restart it in safe mode.
  • Restart your device.
  • Now go to Action Center or Windows Defender app and you would be able to turn on Windows Defender.

Get in touch with us to troubleshoot Windows Defender Error 577

Now, you have finished all the steps to resolve the issue of your window defender error. If the issue still persists, don’t get hesitated. Feel free to contact our customer support executive. Our experts are available 24*7 for the help of the clients. Our experts are highly skilled and trained. So, feel free to contact us at any time anywhere. They are constantly prepared to help you. If you confront any specialized issue in McAfee items, reach us on the McAfee customer assistance.

John Woods is a self-professed security expert; he has been making the people aware of the security threats. His passion is to write about Cyber security, malware, social engineering, Games,internet and new media. He writes for McAfee products at or .


Sponsor Ads

About John Woods Innovator   IT Expert

15 connections, 0 recommendations, 56 honor points.
Joined APSense since, February 19th, 2019, From Plano, United States.

Created on May 13th 2019 11:46. Viewed 840 times.


No comment, be the first to comment.
Please sign in before you comment.