I have been hit, out of the blue, by the problem of the media player requiring a computer restart to play songs after a certain number of plays. I've tried the various fixes suggested, such as emptying the start-up menu, without success. I was wondering whether there is a more recent fix to try.
The songs that won't play once the error messages start seem to be the ones physically downloaded from my own CDs to a previous computer. These track media usage rights are shown as "This file can be played an unlimited number of times, collaborative play not allowed, can be burned/synchronised an unlimited no of times, media rights can be backed up". Tracks downloaded from CD to the current computer, and tracks downloaded from Amazon to both previous and current computer, just show "This file is not protected". They continue to be available to play. So I was also wondering whether there is any way to change the designation of the problem tracks -every one of which was legally obtained and paid for.