Hi, My Vista PC has been working fine until yesterday when the following occurred. The PC boots ok and presents the login screen as normal. However, a few seconds after I login a blue screen appears followed almost instantly by a crash dump. Nothing has changed on the PC and I have had a go at unplugging cards and reseating them. The same happens if I try to boot in safe mode. My version of Vista (Home Premium) is an upgrade version on top of XP professional. Without being able to get to the disks, because it won't boot, I am not sure what to do next. The PC won't boot from the Vista upgrade DVD/CD. I am happy to replace the PC but just want to get to the data. I do have backups of most files but want to make certain. The only other bit of potentially useful information I have is that the PC has been displaying odd lines across the screen for sometime. Particulary bad when looking at Vista menus and equally so when watching a movie or something similar. Other applications are fine but often have a few lines around the mouse pointer. I was suspicious that the graphics card was failing. I have thought of buying a new cheap card to test this theory but would rather not if it is going to be wasted cash. Any thoughts would be greatly appreiciated. Many Thanks