Requirements Windows Vista or Windows XP Can be installed on two (2) computers Runs on virtually all modern CPUs Laptop, Notebook, Desktop or mobile computer Speech recognition quality headset or microphone After installing the download or CD, running the software for the first time will cause a window to appear with Mary's face. At this point you know that TalkingDesktop has installed correctly on your computer. Complete the BUY order form or phone 1 850 819-6711 to place your order and you will be issued a serial# to activate the software. Computer headset if the headset or microphone that came with your computer is not designed for speech recognition. The best way to improve your voice interaction with TalkingDesktop is to use a close-talk speech recognition quality headset. Nothing is more frustrating than poor recognition and having to repeat voice commands because the headset or microphone that came with your computer is not designed for speech recognition. More information about computer headsets