How do you want to update Defender?Step 4: Install Windows Defender or another spyware scanner
Windows Defender is actually a very good product, particularly considering its price tag: free. Windows Defender comes standard with Windows Vista. However, Microsoft has made Defender available for download to Windows XP customers as well. Of course, Defender is far from your only choice when it comes to spyware-busting choices, but since it's free, this is the product I will focus on in this section.
After you download Defender and validate your copy of Windows, you have some decisions to make with regard to the installation. First, decide how Defender should receive updates and take action on particularly harmful spyware.