Hi, I know just enough about trouble shooting computer problems to be dangerous, mostly to myself.
My desktop computer is an HP/Compaq dc5750, with an AMD Athlon cpu. The O/S is Windows 7 Ultimate.
It is nothing special, just something I purchased off Craigs List from a guy nearby who does IT support for several small businesses. When he upgrades their hardware, he puts the old computers on CL for sale.
It is nice that he updates all the software to current Windows Office apps so, for ~$150 you get a decent running computer with software that would cost you more than the computer.
I earn my living by working in R&D for a big pharma company in Research Triangle Park.