Pretty much as the title says... I'm really stumped on this.. It's now the second time its done it. The first time I checked and verified permissions, verified the disk and it said that it needed to be repaired... Repaired it and all was well... Try and clone its HD so I can do a clean install to get rid of 3 years of rubbish and big bits of software like VPC... it failed, froze, restarted, no ding... fully loads.. Im rather concerned. At the moment it works, as far as I can tell, perfectly... just no ding!! Ideas?