If you were unable to conduct an SFC scan previously, or if the DISM scan did not resolve your issue, run the SFC scan again and see if it fixes the problem.
Enter the following command and start preparing for the scan to execute: sfc /scannowĬheck to see whether the problem has been resolved after the scan. To open Command Prompt as administrator, press Windows key + S, input cmd, and then click Run as administrator. Several difficulties can arise, and if you are having trouble using Windows Defender on Windows 10 or Windows 11 computers, please check some of our alternatives.Ħ Methods to Fix Windows Defender Won’t Turn On Method 1: Run an SFC Scan G) Windows Defender will not open, operate, work, activate, or begin: To resolve the issue, uninstall Spybot entirely from your computer and see if it fixes the problem. Many Windows 10 users have experienced this issue with the Spybot program. To resolve this issue, use the specialized removal program to delete any remaining files and registry entries related to your antivirus.į) Windows Defender will not activate Windows 10 Spybot. If this occurs, run SFC and DISM scans to see if this resolves the problem.Į) After removing Avast, Bitdefender, McAfee, and AVG, Windows Defender would not start:Įven after uninstalling your antivirus, Windows Defender would occasionally fail to start. In some circumstances, you may receive an error message while launching this anti-virus product. However, you can correct this by implementing one of our methods.ĭ) Windows Defender will not start due to an unexpected problem: Windows Defender will sometimes not run because Group Policy deactivates it. In addition, make careful to delete any antivirus-related files and registry keys. If this is the case, uninstall all third-party antivirus software from your computer. Many customers report that it will not launch on their PC. This issue can also occur in Windows 8.1/10, but you should resolve it by utilizing one of our methods. Reasons Why Won’t Windows Defender Turn On
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