Cannot delete music
 

Hello, I am unable to delete many music files on my computer for completely
unknown reasons. I am running Windows Vista Home Premium I believe it's called.
The computer says, "You need permission to perform this action." I
have tries to change the permissions by going to "properties" and
trying to "edit" the "security," but it doesn't allow me to
change it! I'm going bananas! Please help me figure this out, I shall give you
my first born!