Can I download iTunes courses on a PC running Vista?
I am attempting this but the course seems to be stuck in a perpetual download.
iTunes U Courses only work on iOS devices. iTunes U Collections work on iOS, Mac and Windows.
For more details about the differences between Courses and Collections, see Is iTunesU available for a Windows PC?
Would you please provide links the course and material you are trying to download? (To get the course link, find the course in the iTunes U Store, click the down arrow to the right of the Subscribe button, then click the "Copy Link" menu item.)