According to Carrona.org
, STOP 0x0000007B: INACCESSIBLE_BOOT_DEVICE
Hard drive, File system, Boot sequence errors, Device driver, Virus infection (in particular check the MBR)
Do you have access to another computer to download and burn a bootable iso in a blank disc/ flash drive? If so, scan the system for possible virus infection
as guided in the following link.
Let us know the results.