Yesterday out of nowhere my iMac g5 started acting screwy on me. First, all the things sitting on my desktop disappeared(including the HD icon) and then I was and am still not able to open my finder. Now I can't even reformat anything because I can't open my finder to first back everything up. Also, all the things next to the spotlight icon have disappeared too, like the time, bluetooth, etc. I can't even load up the OS X disk, there's just no way to run it. So yeah, that's about it, hopefully someone will have some advice.