You might see this error several times while using the Windows operating system. “An Operating System wasn’t Found” is a very common error that most of the Windows users don’t know what this error comes from and don’t know, how to fix operating system not found error. There are thousands of people that asking a solution to this error message that says “Operating system not found“. One of the Windows users who asks this question. In this article, I’m going to show you the way on how to fix operating system not found or missing operating system.
I have a Windows 8 Acer laptop, and I did not upgrade to Windows 8 from Windows 7. I bought an Acer laptop that had Windows 8. All of a sudden a plugin crashed and they were doing an upgrade. I was stupid enough to turn off the laptop and after the Acer logo came on. It goes to “Operating system not found” on the top left corner. I pressed F2 and got to the system settings. I changed a couple of things that I have no idea that what I’m doing and every time it shows up something new I just keep pressing control-alt-delete and it keeps flashing over and over. Now, can you tell me what to do?
What Does it Mean When your Computer Says Operating System Not Found?
This means for your computer might happen the following issues. When your computer hard disk, inappropriate or incorrect BIOS settings, damaged or corrupted HDD, and the last thing. You might have partition something wrong and your disk become deactivate.
- The basic input/output system (BIOS) does not detect the hard disk that installs Windows.
- The hard disk failed either physically or logically.
- Users make inappropriate or incorrect BIOS settings.
- Windows Master Boot Record (MBR) located on the hard drive is damaged or corrupted.
- The partition which saves Windows boot files is no longer active, or users set the wrong partition active.
Fix Operating System not Found
This error can appear to another way also like “Missing Operating System” or “An operating System Wasn’t found try disconnecting any drives that don’t contain an operating system. Press Ctrl+Alt+Del to restart”. You might see this error as well. So, in this article, I’m going to show you the best way to solve or fix operating system not found error. It’s straightforward and simple. Just follow the instruction correctly.
Step #1. You need a bootable USB flash drive for Windows to boot your computer with. If you don’t know how to create a bootable USB installer for Windows so visit “4 ways to create a bootable USB for Windows“. Or you need a Windows 7, Windows 8 or Windows 10 DVD. Just boot with anything that is available for you.
Press (F2, F3, F8, F9, F10, F12 or Esc) to bring the boot Menu. It’s different on the systems. Choose “Boot Menu“.
Step #2. Select the DVD or the USB Installer then hit enter.
Step#3. Once you booted your computer, choose the Language, then press “Next“.
Step #4. Click on the “Repair your Computer” link at the bottom of the screen. The primary purpose here is to open up the command prompt or “CMD”. You can bring the CMD without going to the repair option. Just press “Shift+F10” then the command prompt will appear. But here I want to show the advanced way.
Step #5. A new blue screen will appear now. Choose “Troubleshoot” to reset your PC or see the advanced options.
Step #6. Choose “Advanced Options“.
Step #7. From the upper left-hand side, choose the “Command Prompt“. The command prompt will appear automatically.
Step #8. Once the command prompt appears, find the drive that operating system is installed on. Type the following commands. If you did not understand any command, hit a comment below this post.
Note: Assign command is optional here. If the active command does not work, then type the assign command as well. X in the command can be every number from one to five. You must choose the drive that Windows is installed on that drive.
- List disk
- Select volume x (x=1,2,3,4,5)
Now, close the CMD then restart your computer. The problem is solved now. If it’s not solved, just put the error in the comment area and press post comment.
This was how you could fix operating system not found or an operating system wasn’t found. Try to disconnect any drives that don’t contain an operating system. Or “Press Ctrl+Alt+Del to restart“.