BleepingComputer.com: Bootnig problem

Hello i have some problem with my laptop toshiba qosmio gd50-132. i get a message error when the computer start up:
insert system disk in drive. Press any key when ready.
Earlier i got a problem with my computer so i removed the hard disk and and format in another computer and i made the installation of the os
but still now i dont know what's the problem and my system does not work.
Please help me because i have to complete some work.

I don't understand what you did. Why did you format the drive in a different computer? And when you reinstalled the OS, did you do that in the other computer or in the one with the problem?

my computer was not working and it was impossible to boot the cd of os in my computer so i try to make the installation in another computer. i have removed my hard disk and then i have done the installation of the os in another computer like i want to know if the hard disk was working fine. after the completion of the os i put the hard disk in my computer and i saw the same error message

You cannot install an OS in one computer, move the hd to a different computer, and expect it to work.

FWIW: Changing a Motherboard or Moving Hard Drive - http://www.michaelstevenstech.com/moving_xp.html

Louis