If you are using recovery CDs, with or without the NTLDR present in the HD should work. Perhaps what is needed is for you to set the laptop to boot from the CD. This could be done in the CMOS/BIOS configuration.
Alternately, if only the NTLDR is missing and everything else works OK, you can try removing the HD from the PC and connect it as a slave or an external USB mass storage device to a 2nd PC. It will be a simple case of copying the 2nd PC's NTLDR to the HD missing it.
In some instances, memory problem triggers this message as well. You can try cleaning the memory's little gold contacts/pins and/or try replacing them.
Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.
Good luck and kind regards.
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