You need CDBurner XP to burn DVDs in XP as XP hasn't got this feature. When you burn to RW disks you need it to be multi session and not finalizes (closed) as this prevents further burning. Save your data on one of these disks then use CDBurner to erase the disk and try again using multi-session.
What is Amazon Go and will it come to the UK? The store without checkouts or queues