Operating system not found or Missing operating system error when you start your Windows (8.1/8/7/vista/xp) or PC (sony, hp, dell, lenovo, acer, asus).There are problem with your system partition, your Windows operating system not found in your active drive. The simple way to say there are no Windows operating system on your active drive, for example, if your D drive is active then system not find operating system because mostly operating system installed in your computer C drive. So after working hard finally I found the solution. Here I show you a quick solution that found by me and you don’t show this solution on another website. So follow the simple steps and solve your problem.
How To Fix Operating System Not Found or Missing Operating System
Attach bootable USB or DVD into your computer.
After step 2 using the function keys (F2, F12 and Delete) enter the BIOS setup.
Then click on Repair Your Computer below the Install Now button.
In Repair Your Computer Open CMD (Command Prompt).
In CMD type “diskpart” then type “list volume”
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
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.
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Above solution is working 100% if you follow steps correctly. If you have problem during following above steps, then please comment below.