1. Open Start Menu 2. Click Settings 3. Click Update & Security 4. Click Windows Defender . This tab is in the left pane. 5. Click Open Windows Defender Security Center 6. Click Virus & threat protection 7. Click Virus & threat protection settings 8. Enable Windows Defender's real-time scanning. 9. Click Yes when prompted. 10. You Have Enabled your Windows Defender real-time scanning feature.