Stop error code 0x0000007B (INACCESSIBLE_BOOT_DEVICE)
Possible Causes:
1. could be caused by a wrong BIOS setting, may need to be set to AHCI or reverted to ATA/IDE mode,
2. could be it needs the SATA drivers,
3. or it could be a BIOS, or Boot Sector virus (unlikely if it's never been used).
4. it could be a bad digital or power connection to the Hard Drive.
5. Hard Drive may need to be Initiated.
Possible Fixes:
1. As the BIOS Hard Drive settings aren't accessible, set it to default settings or reset it with battery off for 5-10 minutes... this will most likely revert to factory defaults and may recognize any hard drive.
2. To postpone the SATA drivers installation, and if the AHCI-SATA-IDE Hard Drive settings become accessible after a BIOS reset, use the ATA/IDE mode that shouldn't need drivers.
3. Resetting the BIOS with battery removed for some 5-10 minutes should delete any virus.
4. Check the Hard Drive SATA digital and power connections aren't lose, try a different SATA port.
5. If you haven't yet initiated the Hard Drive try formatting and Activating it in another computer...
See if something else mentioned in the KB324103 article coincides with your problem.
http://support.microsoft.com/kb/324103