Windows Defender Antivirus in Windows Defender Security Center enables you to scan specific files and folders to make sure that they're safe. You'll be notified immediately if any threats are found.
- To scan specific files or folders, right-click the ones you want, and then select Scan with Windows Defender. Or, go to Start > Settings > Update & Security > Windows Security > Virus & threat protection > Run a new advanced scan > Custom scan > Scan now, and then select the file or folder that you want.
- To turn on Windows Defender Antivirus, go to Start > Settings > Update & Security > Windows Security > Virus & threat protection > Virus & threat protection settings, and then switch Real-time protection to On. Windows Defender Antivirus will then automatically turn on. If you're running Windows 10 for Enterprise, turn on Windows Defender Antivirus by uninstalling all of your existing antivirus programs.