I'm not sure whether this would affect you, seeing as you're talking about upgrading Roxio 9 to Roxio 10 BASIC, but I've tried to register version 10, from the May issue of PC Advisor magazine, only to be met with the following message:
The page you were trying to view is no longer here. We hate this as much as you do, so we'd like to offer you a coupon for 10% off your next order to make things right again. Just enter coupon code 404SAVE10 at checkout!"
Dunno whether PC Advisor have made a booboo with the hyperlink they've provided on the DVD, or whether Roxio have been inundated with people attempting to register. Maybe someone from PC Advisor could advise us on this one.