upgraded itunes

[julieday]

hi i just upgraded my itunes and upon restart of my computer the entire itunes library has completely vanished. i did a search for mp3's and nothing
where did all my music go? any help would be much appreciated!

[ricksbrain]

hi i just upgraded my itunes and upon restart of my computer the entire itunes library has completely vanished. i did a search for mp3's and nothing
where did all my music go? any help would be much appreciated!

Windows? Mac? Upgraded iTunes to the most recent version? Can you see the mp3 files still somewhere in the computer?

As much relevant info as possible will help.