I'm trying to archive some of the stuff I already have on CD-Rs to DVD-R.  I know that the files I'm trying to burn work just fine on the hard drive.  However, between two attempts at burning a data DVD, two files continue to not work on either disc.  I burned the discs making sure not to be using any other processor or memory intensive apps at the same time.  The data verification went off without a hitch.  Unfortunately, every time I try to open the files from the disc, my computer just hangs.  All the other files on the disc work fine, so they're not quite coasters.  I can't drag the files to my hard drive without causing it to hang either.  Having already wasted two discs in the attempt (I don't like partial archives), I want to know what's going wrong before I try again.  Any advice?
				
			 
	 
				