Yes, it did, although I can't remember now whether the PC originally came with W7, or with Vista.
Could that cause the symptoms I'm seeing? It's not completely dead. It will write smaller disks successfully.
If this is the case, is there a free version of Roxio that will work with W7?
If not, can you suggest some other free CD/DVD burning program? I don't need a lot of fancy features - just the ability to burn whole DVDs reliably...
Thanks - Rowan