Project Server 2010

• "Microsoft Project Server 2010" cannot be installed on "Microsoft Windows XP." It requires the "Microsoft Windows Server 2008" operating system, or higher.
  
  

Project Server 2007

• "Microsoft Project Server 2007" cannot be installed on "Microsoft Windows XP." It requires the "Microsoft Windows Server 2003" operating system, or higher.
  
  

Project Server 2003

• "Microsoft Project Server 2003" cannot be installed on "Microsoft Windows XP." It requires the "Microsoft Windows Server 2000" operating system, or higher.