I have a very similar problem to others already posted on this site. I am running WIN XP Pro on a HP Laptop. I left it on my desk for about 1hr and when I came back I had the black error screen saying that windows had not started properly. When I select Safe Mode (or any mode) it tries to load but I then get a message saying "Press ESC to cancel loading SPTD.sys". If I press ESC it tries to load XP for about a second, it sometimes shows a blue screen for a slipt second and then returns to where I was before. As I said, very similar to other cases on this forum so I have run through all the solutions offered - including repairing from CD which doesn't work because it doesn't regonise any discs. I have checked the hardrive is firmly in place. I have tried all versions of safe modes without succeess. Can you please help?