itunes error

Hey everyone,

Just wondering if anyone has had this problem. I have a pc, have never had problems with itunes before and last night I went to open my itunes to listen to music and all my files have a exclamation mark in front of them. When I click on it, it says that the orginal file cannot be found and none of the songs will play. I am not sure what to do?? Does anyone have any idea whats going on??

Thanks

The exclamation marks mean

The exclamation marks mean that iTunes cannot locate the file for that item: it has been moved, deleted, or renamed or something. If you know where the file is (that is, which folder), re-load it into iTunes (either by clicking and dragging from the folder onto the iTunes Library, or by using the menu "add file").
 
More help available in iTunes Help in menu a top of page.