iTunes disappeared from windows 7

Hey guys I hope you can help me!

I was updating my current version of iTunes and QuickTime, during this time my PC

shut down for no reason. And When I turned on my computer iTunes disappeared

from my desk, funny because QuickTime Player is still there. I tried to install it again

but I got an error message saying that iTunes couldn't be restored.

What can I do? I really need to sync my music! Please help me!