I am not a computer expert and have no programming experience. I have downloaded Ubuntu 12.04 from the website using the Windows installer onto an admittedly old Toshiba Satellite Pro laptop. The download seemed to be fine.
When I try to startup the laptop and select Ubuntu I get a long series of messages starting:
"error: couldn't read file [0.7392640 Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block (0,0)"
I have seen other entries on this messageboard with similar questions but to be honest, I can't follow the answers, which presume more knowledge than I have. I would be extremely grateful if anyone could suggest a solution.