I have a Sony Vaio RS322 with a DVD-RW. I use Nero and RecordNow to burn in DVD's. For the first three months it went perfect. Now while in the middle of burning a DVD and sometimes a CD the computer will freeze up. At first I thought it was the DVD Media and changed brands. That didn't work. I called up Sony and they had me reload the software and that didn't work. I make sure that there is nothing running on the machine before I burn a DVD and that still does not work. The entire system freezes so I don't see any error messages. Any suggestions? Thanks.