the folder originally?
It is probably now that you will have to point iTunes at the correct file on the first occasion of you playing a track.
Once iTunes knows where it is, all will be well.
Using Windows 7. I have moved my files around a bit (put itunes media file on Public Music) in an attempt to share music with another account on same computor. Despite exact following of instructions, this did not work, so I returned media file to original location. Now itunes can not locate original file when attempting to play songs. Preferences/Advanced location pointer is correct. Songs are all present in media file. I am way out of my depth here, please help!!