Windows 10: Computer won't see primary HDD after hard restart. Why?

A few times recently after my computer shut downs improperly from either a power loss or from a hard restart from freezing, it will start up with a black screen that says:
"Remove disks or other media. Press any key to restart."
If I click any key, it'll say:
"Reboot and Select proper Boot device or Insert Boot Media in selected Boot device and press a key."
If I click any key, it'll just go back to the first message.

I think this is because it is not seeing my primary HDD Drive C. I go into bios and it only lists my secondary storage drive Drive E as well as the DVD drive. It's like it doesn't even see my primary HDD.

Any thoughts on what might be going on?
After fiddling around and not changing anything, it'll work after awhile. Not sure if there was anything I did besides giving it a chance to try a handful of times.

Any reason after a shut off, it wouldn't see my primarry HDD?
My computer is an ASUS running Windows 10.

:)

 

Hard drive/ OS issue

a guy suggested :

• shutdown
• unhooked HDD
• restarted
• yay !!
• reconnected HDD
• restarted
• yay !!

also , try method 3
How do I unlock the drive where Windows 10 is installed?

 

unlock hdd

Hi Johan,

It is possible that your
HDD was unreadable
causing the error message to appear. We recommend that you perform these troubleshooting steps and check if there are any changes:

• 
  Shutdown
  your
  PC.
  
• 
  Unhooked
  the
  HDD
  and
  turn on
  your
  PC.
  
• 
  Reconnect
  your
  HDD
  and
  restart
  your
  PC.
  

If the issue persists, we suggest that you contact your
laptop/computer's manufacturer
for further assistance.

Update us on how it goes.

Regards.

 

unlock hdd