How to transfer music files with Windows 7 and iPhone 5?

My Toshiba satellite P750 recently had a hard drive crash and took 36 hours of non backed up music with it, however the music is on my new iPhone 5. I tried to use the hidden files method to find the music but all it will open is pictures, is this problem due to the iPhone or windows 7, and how do I fix it?

I think the problem is windows7, and I advise you reinstall your system.