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Easiest way to Fix Operating System Not Found or Missing Operating System in simple 8 steps.
Step 1
First, find the windows OS (Operating System) DVD or bootable windows OS USB device.
Step 2
Attach bootable USB or DVD into 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 are 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.
