Umm . . . Which one

Main Desktop, Quad Core, 3Tb HDD, 64Bit Win7, with Twin FlatScreens in the Study / Modelling Room.
Toshiba Satellite Laptop, Dual Core, 32 Bit Win 7 in the Bedroom.
Pentium P4 running WinXP Pro and Mach3 for the CNC Mill in the Workshop.
Pentium P2 running DOS and TurboCNC for the CNC Router in the Workshop.
Toshiba Tecra Laptop running WinXP Pro and various Robotics & Arduino Software, currently under my feet.
Guilt - none at all, either way.
Murray.