Hi, I recently had problems with my desktop icons disappear every so often leaving only the wallpaper. They would reappear after a laps of about 15-30 seconds. While I was trying to transfer data from a memory card, the refresh would kill any copying currently running. I disconnected all external devices and I still had the same problem. I ran Disk utility and repair disk permissions. Fairly quick process then I tried to verify the disk (hard drive) and the program became unresponsive. I could not hit stop, close the window or cycle to other programs. I also could not open Force Quit. The cursor is still responsive and the display will go to sleep. The hard drive is not and it is not transferring power to iphone. What do need to do to fix this? I am afraid to do a hard reboot although I do not think the disk is spinning based on sounds.