Hiya and thanks for your reply. I'll do a dxdiag txt file later when I get home, but its Windows Vista SP1 Ultimate edition, 64-bit OS. I've got a Creative Soundblaster X-Fi Elite Pro, and Ati Radeon HD 4870X2 Graphics card.
Yes I did have an earlier version, Roxio 2009 Special Edition, but I've uninstalled that, and cleared all the registry and Program Data entries, apart from the Smartsound, because I've bought some music files that I wanted to keep. I also didn't uninstall the Blu-ray plugin.