Windows Security updates you about antivirus protection by showing you when: Your device was last scanned for threats. Your definitions were last updated—definitions are files that Windows Security uses to protect your device against the latest threats. The Device performance and health scan was run. This scan ensures your device is operating efficiently. Understand and Customize Windows Security features. You can customize how your device is protected with these Windows Security features. Contents: [ hide ] Understand and Customize Windows Security features. You can customize how your device is protected with these Windows Security features. To access them, select the Start button, then select Settings > Update & Security > Windows Security. Then select the feature you want to explore. Virus & threat protection . Monitor threats to your device, run scans, and get updates to help detect the latest threats. (Some of these options are unava...