I added a hard drive to my computer and got it up and running after some fiddling with the Bios. shut it down later that day and now it will not boot up. It appears that it does not recognise either drive. The hard drive i added was originally an external drive I took it out of the case and installed it into the computer as an internal drive. I had thought about running the XP start up disk but am concern I’ll lose all my data.