Macho these happen coz of two things... 1st I thing you copied some audio track into CD Rom, that option we are using to burn a CD, if u don't need to burn those files select all and delete. if u need those file burn into a CD insert blank cd and click on write these files to cd (you can see this option left hand side on that windows) 2nd thing is macho ubage files extention eka wrong. "double click on my computer icon, 1 click on tool, 2 folder option, 3 file type tab and change your audio extension type...