I think it's a Core Duo, and it looks like one of the cores has been working a little harder than the other. That is probably normal though.
Tbird, it looks like all you're doing is browsing the web (I only see the browser on the taskbar). If so, then that's a lot of memory usage just for that, unless you have a lot of web pages opened at the time. You also have 74 processes running - again, why so many? On my home notebook with just web browsing, I'm under 40 processes. Did you try to run something like a Spybot S&D and going through all the processes that start by themselves during bootup to see if maybe you don't need some of them?
I agree with a Core Duo, either IBM or Lenovo laptop. I would run Spybot or Windows Defender to make sure you have no spyware running in the background.
Tbird, it looks like all you're doing is browsing the web (I only see the browser on the taskbar). If so, then that's a lot of memory usage just for that, unless you have a lot of web pages opened at the time.
Firefox tends to creep up memory usage over time. I've had it consume half a gig of ram before. He may have multiple processes with his stuff showing up in the powertray (virus scanner, etc.)
It looks fine to me. Process explorer is better at showing what is really going on with your system.