No Operating System Error
If you get Operating System Not Found or Missing Operating System Error then here is the solution
Step 1: First find the windows OS (Operating System) DVD or bootable windows OS USB device.
Step 2: Attach Bootable USB or DVD in your computer.
Step 3: After step 2 using the function keys (F2, F12 and Delete) enter the BIOS setup.
Step 4: Then click on Repair Your Computer below the Install Now button.
Step 5: In Repair Your Computer Open CMD (Command Prompt).
Step 6: In CMD type “diskpart” then type “list volume”
Step 7: In list volume, all volumes are shown, then find your system volume where the windows is installed and type “select volume #“(system volume C) shows on CMD. Ex. select volume 3
Step 8: After selection of volume, type “ACTIVE“. Your system partition is active now. Type ”exit” to leave diskpart and again ”exit” to close cmd. That’s it now RESTART your computer.