boot up problem on packard bell 5069 imedia serial number: dc46700720?

I have a packard bell imedia 5069, when i turn the pc on i get the message " we apologise for any inconvience, but windows did not start successfully. A recent hardware or software change might have caused this."
If your computer stopped responding, restarted unexpectedly, or was automoatically shut down to protect your files and folders, choose last known good configuration to revert to the most recent settings that worked.
If a previous startup attempt was interrupted due to a power failure or because the power or reset button was pressed, or if you aren't sure what caused the problem, choose start windows normally.

well i have tried every option it says, it tries to start windows but i only get to the black screen with the windows logo and loading bar on then it returns to the above window after switching itself off first.

This is my daughters computer and as far as i am aware, she said that when the wire leading from harddrive to monitor was knocked the computer would switch off. She does not know where any of the recovery disks are either arghhh. Any suggestions would be really appreciated