SOLUTION: MY SYSTEM IS DISPLAYING NO BOOTABLE DEVICE HIT ANY KEY.

So to begin off i am not exceptionally extraordinary with PCs so I don't know much about this issue yet through numerous endeavors i have not possessed the capacity to settle this. i have an Acer portable workstation with windows 8 and has been running fine since I got it.

Till one morning I woke up to boot my system it displayed no bootable device

When you try to boot your system it will display "no bootable device, Hit any key”. On a blue dialog box ‘’OK’’ in a black dialog box.

Step1

Press shift F2 to reboot (press f2 immediately rebooting)

While rebooting press f2 (it will take you to BIOS)

Step 2

On the menu tab here you will see:

         i.            Information

      ii.            Main

   iii.            Security

   iv.            Boot

      v.            Exit

Note: The direction is below click on boot.

You will see Boot mode   (UEFI)

Secure Boot:   (Enabled)

Select Boot mode and press enter button

A dialog box with blue background will display writing   UEFI                                                                                      Legacy BIOS

In this case select legacy BIOS and press enter

Step 3

A dialog box will display writing (the available boot device will not change until a rebooting!) on it

Select ‘’OK’’

It will take you back to boot mode

     

 Step 4

Press f10 (to save and Exit)

A dialog box will display (save configuration and exit now) click on yes.

Your system is back to life