Thanks for the reply. I have very little on my computer, it only has photos, music and my emails on, so finding things is pretty easy. This music was disappearing before my eyes. I truly had just played one of the songs minutes before, then when I went to play again, it was gone. As I clicked on it, the ! appeared on lots of songs. There is no rhyme nor reason for it, on some it is one track from a CD, on others it is nearly all, it is madness. I am using windows.
I have uninstalled itunes and removed all the music in the itunes folder. For some reason, that folder with music remained when I uninstalled itunes. Just for info it is windows 8 (hate it!) and a Toshiba satellite. I have searched all over, no sign of music anywhere else. As I say, there is very little on my laptop, so it is easy to find stuff.
I guess I join the list of what appears to be thousands where their music just disappears.