MCAFEE - McAfee VirusScan Plus w/ SiteAdvisor. Functions and Features: Adds safety ratings to websites, Stops Hackers, Blocks Spyware Bocks and Removes viruses, Improves PC Health. System Requirements: Windows 200 with Service Pack 4 (SP4) or higher, Windows XP with Service Pack 1 (SP1) or higher, Windows Vista personal computer with Pentium-compatible processor 500 MHz or higher and 256MB of RAM. 800x600 Resolution Internet Connection Microsoft Internet Explorer 6.0 or later or Modzilla Firefox 1.5 or later. This item cannot be returned or exchanged if opened.