Downloaded an MPEG Audiosong File to itunes and iphone 3gs and desktop erratic -

[scrabble]

I downloaded a MPEG Audio File song (Machu Picchu Condor Song, Flute/Harp Music) from utube one week or so ago and ever since I did this, my desktop has been crashing and continually gives me messages that error report needs to be sent. I removed the song from my iphone 3gs but cannot remove from itunes on my desktop computer. Anyway to get rid of it?? Please help.