Thanks, guys! Yeah, the system is a home-built one. The seller said he built it about three monts ago but decided to upgrade to a bigger rig. The case is probably generic, as I don't see any brand name on it. It's styled in the way of the "see-through" computer cases that seems to be the trend these days, yet it's not outrageous or anything.
About the RAM. There are two sticks, and on each stick there is that sticker that says "Void if removed" it says "1G Kit." So does that mean I have 2GB total? Seller advertised it as 1GB, and if I recall the system specs says 1024GB and then there is 2GB; one is for physical and the other is for virtual or something.
Also, the ad said it has a built-in 128MB video on the motherboard. How can I tell? I asked the seller and he said I could add in a better video card via the PCI slot.
THe system comes with Windows XP Pro w/ the service pkg2 or something. Also seller upgraded OS so that you can make it look like Vista. There are some other software in there, such as MS Office 2003.
Oh, yes, I felt a need to rub some of the goo off on the CPU so that I can make sure it is a P4

Even though I know the system spec page will show you. So it is safe to remove this goo from the CPU with rubbing alcohol and reapply a clean layer?
Next upgrade will be a widescreen LCD! I'm still using a CRT--yes, laugh! In fact, you will laugh at my PIII that I've been using the past many years. I do have a Dell Inspiron 8500, but I use the desktop more when at home.
edit to add: forgot to say that it has a DSL connector already on the motherboard, six 2.0 USB ports (4 back, 2 front), two PCI slots, one black slot above them (don't know what that is), 3 fans (5" back, 3" side, and 3.5" CPU--three extra vents for additional fans), and it has some 7.1 audio thing.