microsoft security essentials windows 10 defender download

Restart your PC once the process completes.The SFC tool will automatically scan for corrupt and damaged files and repair them.When the command prompt window opens, type in “sfc/scannow” (no quotes), then hit Enter.Select Yes if the User Account Control (UAC) prompt appears.Type in “command” (without quotes) and then right-click on Command Prompt.Press the Windows logo key + S combination to bring up the search bar.Luckily, the System File Checker can help scan your computer for corrupted system files and immediately repair them. So, it could also be why you can’t successfully launch Windows Defender on your machine.

Method 4: Use the System File Checker SFCįile corruption is a common cause of most issues on Windows PCs. Now check if the problem has been fixed.ĭon’t give up if you are still getting the error when trying to open Windows Defender.Wait for the system to check for updates and download them on your machine.Click on the “Check for updates” button.Launch the Settings app by pressing Windows Key + I on your keyboard.However, if you have disabled updates on your computer, you might have missed some.įollow these steps to update your operating system: Windows can download updates in the background. Installing the latest updates is the best solution. Windows is an amazing operating system, but it sometimes gets buggy, triggering issues such as Windows Defender not working correctly. A good example of such an app is Auslogics Anti-Malware. We also recommend installing a professional antivirus program that can protect your computer without interfering with other system functions. If it does not, try uninstalling the third-party app to see if that helps. Then reboot your computer and check if Windows Defender will launch. Therefore, open the app’s settings and temporarily disable its protection. If you have an invasive antivirus app, it could be the trigger. Some can work without interfering with other programs on your computer, while others can’t. Method 2: Disable Your Third-Party Antivirus AppĪntivirus apps usually work differently. If not, correct it immediately and then check for the issue. Thus, ensure you check if your device reads the correct date and time. Method 1: Check Your Date and Timeĭid you know that many PC apps usually depend on the system date and time to perform some functions? Therefore, if these are incorrect, you could easily experience abnormal behaviors with some programs.

Below are the techniques that proved effective on most people’s devices with the same issue.

Since varying factors trigger this error, we suggest you try different tactics until the problem disappears.

Microsoft security essentials windows 10 defender download