Windows Defender: Error 577 - you can do that
If Windows Defender reports error 577, the protection software can no longer be activated. We'll show you how to solve the problem.
Fix Windows Defender Error 577 through system repair
Windows Defender is only a basic protection for Windows computers. As soon as the correct anti-virus software has been installed, for example by Avast, Avira or AVG, the Defender switches off.
- Press the [Windows] and [X] keys at the same time, so that the context menu opens at the bottom right.
- Select the "Command Prompt (Administrator)" option and confirm the process.
- Now enter the command "sfc / scannow" and confirm with the "Enter" key.
- Your system is now checked for errors and repaired if necessary.
- Then use the following command for another scan: "DISM.exe / Online / Cleanup-image / Restorehealth".
Windows Defender: How to fix error 577
- Deactivate Defender: If the problem has not yet been solved, deactivate the Defender. You can then deactivate the protection software again.
- Uninstall: There are often conflicts between the anti-virus programs and Windows Defender. Uninstall the anti-virus software and then download it again. You can find detailed instructions here.
- System Restore: If all of this doesn't help, you still have System Restore. Choose as early as possible when the problem has not yet occurred. Your personal files are not affected by the recovery.
In the next practical tip, we will tell you whether Windows Defender is sufficient as virus protection.