I'm using an old IBM NetVista. It has a 767mhz processor and 192megs of RAM. For a hard drive it has a 80gb Western Digital 7200 rpm IDE drive. For an OS i use Windows XP Professional SP3. This computer used to be my main computer and then i got a new laptop and i don't use that any more. You have to either find a free computer either on the side of the road or on a couple websites EX. http://www.craigslist.org/
(you have to have a membership for freecycle.org which is free) The computer doesn't have to be anything special you can use a 450 mhz Intel Pentium II with 128 mb ram, and Windows 2000 SP4.