A question for people a lot more savvy than I with computers ... Why does a computer "slow down" after a few years? How and why does it go from lightning fast out of the box to taking 3 to 5 minutes to open iTunes years later? Why does it take a minute for a simple webpage to load? Why do I see that damn beach ball all the time when all I want to do is scroll down a page? I ask because I'm looking for solutions to pep up my iMac. I bought it in February 2008, a 21.5-inch screen model with 250 GB hard drive, a 2 GHz Intel Core 2 Duo processor with 1 GB of memory. So, is this an issue of buying more memory? Or is it time to start shopping around once this thing really starts dragging? Any advice is appreciated. And go easy on me, I'm no computer expert.