Recently, my laptop would freeze up at random. I would not be able to move the mouse, Ctrl +Alt+Del. So I tried to renew the computer with the recovery CDs. I rebooted the computer only to find that it said "OPERATING SYSTEM NOT FOUND." I put in the boot CD and put in the image DVD to restore it (Symantec Ghost 8.0) but when I had to choose the hard drive to put it on, nothing came up. I bought and installed a new hard drive. About half of the time it recognizes the hard drive, and other times it does not. I don't want to buy a new computer so What should I do?