Hey everyone, I'm trying to reinstall Leopard because, well, it's stopped working properly. Mainly, it doesn't sleep anymore - it mainly just freezes when I try to make it sleep and gets really, really hot in my backpack. I've turned off every program I could think of, repaired permissions, reset the PSU, reset the PRAM, repaired the disk, checked the memory for other hidden program that might be causing a problem, checked the console, and no I don't have any USB devices I'm plugging in or unplugging. So I downloaded a 10.5.2 image (yes, I definitely purchased 10.5) thinking that it would cause problems if I did an upgrade install 2 point releases backwards. Is that right? Or can I do a backwards upgrade? Anyway, the 10.5.2 release wouldn't install on my computer. It says "this software cannot be installed on this computer" or something like that. So how should I go about reinstalling? I could use my original disc and do an archive install, but that's a huge pain. Thanks.