Hi I'm running an iMac (one of the all-white, 1.83 GHz C2D machines, with 512MB RAM) and i've noticed in recent months it's become outrageously slow, i have no idea why but it's just horrendous. I'd really like to start afresh with a clean install of Leopard, but only if it will make a difference. Currently i'm finding that even with 2 apps open (eg Mail and Safari) there is serious lag now and again, and sometimes things lock up completely. Is this just a bloated OSX install or signs the computer is dying? Anyway, i have a 180GB backup drive currently used for Time Machine, but if i reinstall then restore from that drive, won't it just restore all the bloat? I'm just really stuck, no idea how to fix this mess, or even if it's fixable. I'm going to get a MacBook Pro in June, but i cannot wait until then to have a functional computer.