Avg is not updating failed connection
Step 2: In the pop-up window, enter DISM /Online /Cleanup-Image /Restore Health and hit Enter to execute this command line.
Similarly, this scan will take some time, just wait and don't interrupt it.
Note: Installing Windows update may give rise to data loss, thus, you had better back up your important files before an update so that you can restore the computer to a previous state in case of accidents.
Back up Files or Windows OS before an Update To back up crucial files, you can choose the professional backup software for Windows 10/8/7, Mini Tool Shadow Maker since it allows you to back up files into an image and sync files or folders to other safe locations.
Once this service is restarted, you can check if the issue -Windows Defender not starting is solved.
If Windows Defender will not turn on Windows 10/8/7 and runs into an unexpected error, perhaps there is something wrong with your system files. SFC, known as System File Checker, is a utility in Windows that allows you to scan for corruptions in Windows system files and restore them.
How to scan your system files and repair missing or corrupted files? Step 1: Type cmd in the search box of Windows 7/8/10 and right-click on it to run this program as administrator.
Well then, what to do if you are troubled by Windows Defender not working?
How to turn on Windows Defender in Windows 8/10/7 successfully? Get the full solutions from the following part to help you out.
This tutorial - How to Sync Folders Windows 10 to External Drive?