• Have heavy emphasis on GUI and ease of use
  
  
• Graphics Engine (GUI) is built right into the core of the Operating System
  
  
• The above is to make the GUI fast but failure of GUI components leads to system unstability
  
  
• Issues of Portability: Since the GUI is built into the core of the Operating System, the Graphics is tightly coupled with the underlying hardware.
  
  
• Proprietary Formats for Multimedia: Does not allow wide deployment of Uniform, Cross Platform Standards, hampers progress.. e.g Real Music Format, Windows Media etc.