Ok, this is my first post here, so I'm sorry if this isn't the place for this question. What happened was a few a days ago I woke the computer from sleep and it was very slow and then just stayed on a black screen, so I restarted it and that was that, worked fine. Then today I was moving some files to a Win 7 virtual machine with some other apps open, it was pretty laggy (which I expected) and then just froze, so I left it a few minutes and saw it was still frozen so I restarted again... but now I'm stuck on a grey boot screen with the Apple logo with a spinny thing below. I only waited about 10 minutes before restarting again. So what's going on here??? Do I just need to wait longer or is something wrong? I'm really scared to death because this same Mac's HDD failed about a year ago (thank god for Apple Care), but now warranty is up and a $300 repair is not possible... I just really can't go through that again. It's a 2008 Core 2 Duo iMac with 2GB of RAM running OSX 10.5.8, by the way.