Blue Screen - Inaccessible Boot Device stop code 0X0000007B

You may see this error during Windows startup if Windows cannot read
data from the system or boot partitions (Hard Drive). Faulty
disk controller drivers are often to blame, but this problem can also be
caused by hard disk errors, or even a corrupted boot.ini file.
If all is well with your drivers and your drive, and you haven’t been
messing with the boot.ini file (such as while installing multiple operating
systems), check your system BIOS settings.
If you encounter this message while upgrading to Windows Vista, it may mean that one or more devices in your system are not compatible with Vista. Try disconnecting unnecessary devices, or at least look for updated drivers and firmware. Also, disable any antivirus software you may have running.