win xp emulator

i installed the xp emulator and virtual machine as prescribed in download....when i tried to open xp emulator getting error message saying an older version of Virtual machine is installed and must be removed.....wher is it and how do i uninstall ???????

It may help you ....
http://www.sevenforums.com/tutorials/17380-windows-virtual-pc-delete-virtual-machine.html

After that, follow the tutorial to have a properly working XP virtual machine ...
http://www.sevenforums.com/tutorials/8247-windows-xp-mode-install-setup.html