Got some different Verbatim disks which will run at 1x speed and now have 3 language options GB,F,D. the F and D work when I change volume giving "louder" and "quieter" but when I select GB, the volume slider starts to freeze and the system re boots. I'm no expert but I think there must be some corrupted files somewhere and I'm not convinced it's connected to the 10 X speed of my earlier burns as some say that modern writers/media don't work well at low speed as they're optimised for high speed transfer. I think I'll repeat the whole process using XP as I've never really trusted Vista.