New in recent versions ( build 10586 and up) of Windows 10, however, is the ability to quickly scan an individual file or folder via the right-click menu. By default, Windows Defender will scan the files you access in real-time to detect and prevent infections, but users can also trigger a manual scan of their PC at any time by launching the app. Windows Defender is a relatively effective anti-virus and anti-malware application that ships as part of Windows 10.