Enter "defender" (without the quotations) in the Apps box, then click on the magnifying glass to start the search for Windows Defender. Open the application when it's found. Click on, or tap, ...

Not quite sure what Defender is doing. I never used Win8, so this is new stuff. I have it configured for Real Time Protection and all that. If I open Windows Defender, I get a little castle wall ...

Choose Windows Defender from the menu, then select Open Windows Defender Security Center. Additionally, go to Virus & threat protection , then take the step to Virus & threat protection settings ...

To perform an offline scan with Windows Defender, open your Windows Security settings, navigate to ‘Virus & threat protection,’ and select ‘Scan options.’ Choose ‘Microsoft Defender ...

When you open Windows Defender, you'll notice the PC status: Windows Defender Periodic Scanning is ON message. If, during periodic scanning, new threats are found, you'll get a toast notification.

Check if Microsoft Windows Defender does not start on Windows 10 issue still occurs. Method 9: Reset PC This is considered to be the last resort when the above mentioned fails to fix the issue.

Windows 10 Creators Update offers a feature called Fresh Start, which lets you perform a clean install while leaving your data intact. This illustrated walk-through shows how the feature works.