Unfortunately this could be caused by a number of things but for starters try tapping F2 at boot to enter the BIOS settings and check that the hard drive is recognised.
If recognised you could try tapping F10 at boot to access the HDD recovery utility and recover the machine to factory defaults. If successful this will format the hard drive and reinstall the original OS complete with drivers and utilities.
It would seem that either the drive or the recovery partition is corrupt. I assume that you didn't receive a copy of the recovery disks with the machine?
You can order a set of disks from Support but you may want to first try installing a retail copy of Windows, if you have such a thing, just to check that the hard drive is OK and there is no other underlying problem that is preventing the computer from booting.
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