You have purchased a laptop that runs Windows Vista Home Premium.

According to the question, Windows Defender should scan the laptop for all the known spyware and other potentially unwanted software, including the latest one. Windows Defender uses definitions to scan the system. Definitions are files that include the information of known spyware and potentially unwanted software. To scan a computer for the latest spyware, Windows Defender requires the latest definition files available on the Internet. For this, you have to configure Windows Defender to check for the latest definitions and download them, if available, before scanning the computer. Furthermore, the question also states that the task must be performed automatically. In order to accomplish the task, you will have to select the Check for updated definitions before scanning check box in the Automatic Scanning section.