To choose advanced scanning options When scanning your computer, you can choose from four additional options: • Scan the contents of archived files and folders for potential threats. Scanning these locations might increase the time required to complete a scan, but spyware and other potentially unwanted software can install itself and attempt to "hide" in these locations. • Use heuristics to detect potentially harmful or unwanted behavior by software that hasn't been analyzed for risks. Windows Defender uses definition files to identify known threats, but it can also detect and alert you about potentially harmful or unwanted behavior by software that is not yet listed in a definition file. For more information about definition files, see Keep Windows Defender definitions up to date. • Create a restore point before applying actions to detected items. Because you can set Windows Defender to automatically remove detected items, selecting this option allows you to restore system settings in case you want to use software that you didn't intend to remove.