Holy shit is that thing an antique!!!!! Old DDR2 technology.......... Still have the original 320GB hard drive? If so I would seriously recommend backing up all your personal files at least once a week because a non-SSD that old would be past it's expected life span.
It's a fine old boy....the secret is keeping the dust blown off the motherboard...I hit it with an air hose twice a year. XP SP3 is the finest OS in my lifetime...7 is a cheap imitation and beyond that, I don't care for features I'll never use or bother learning. Since support stopped, I don't do any banking on it and I keep an eye on my control panel to make sure I don't have any visitors....oh, and re-set the registry every week or so to default. It's a tool for me, not a lifestyle...I dig mature stuff, trucks, motorcycles, even women if they're not fat.