Landon starts his computer and receives the error message, "Hard drive is not found." In a panic, he calls you because he did not back up his data and has numerous important files on his hard drive. During your investigation, Landon tells you he was watching a movie on his computer the previous night.
What might be the problem with Landon’s computer?
A. CMOS RAM has lost power and reset to defaults.
B. Boot priority is set to the DVD drive.
C. POST failed.
D. Motherboard needs to be replaced.

While the user facing a problem on his computer system that is he received a message that 'Hard drive is not found'. Then, he freaks out and calls his friend who is the technician because he has lots of important files and data in his hard drive, he tells him that he was watching a movie last night.

So, the technician tells him after the investigation is that its system's Boot priority is changed and it set to DVD drive.