I now found out that dozens of files from the Application folder were missing. One of them was the address book from Mail. I a flash all the files disappeared. I copied a lot from my wife's iMac also 10.5.8. I hope it works. This is what one can call a PC crash, except I can repair them more easily (I hope) Paul Moortgat On 23 Sep 2010, at 19:36, Rich Franklin wrote: > Could be that the file tables lost the link. Much as when you delete > a file, the file is still there, it is just the link in the file > allocation that gets deleted. Try repairing the disk which may re-a > > On 9/23/2010 9:07 AM, Paul Moortgat wrote: >> iTunes disappeared from my HD.