These are the minimum recommended system requirements for Personal Firewall to run. This does not take into account running multiple programs simultaneously. To run several programs on the computer at the same time, that computer should exceed these recommendations.

• Compatible Operating System:
  Windows 95b, 98, 98SE, ME, NT 4.0, Win2000, and XP
  Important note for Window 95 users: Before installing Deerfield Personal Firewall on Windows 95 computer, you will need to have Windows 95 B as well as Internet Explorer 4.02 or higher. (see Knowledge Base article 1914)
  
  
• RAM:
  At least 8MB RAM
  
  
• Hard Drive Space:
  At least 5MB