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Computer can't find operating system.

Anonymous
2024-01-22T20:08:28+00:00

Read through and tried all your articles and examples of fixes.

Been through the BIOS, reboot, reinstallation, repair installation and command prompt time and time again and the issue is still not resolved.

Please help!

Windows for home | Windows 10 | Performance and system failures

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  1. Anonymous
    2024-01-23T06:55:57+00:00

    Hi Ted,

    Welcome to Microsoft Community.

    I'm Hahn and I'm here to help you with your concern.

    I'm sorry to hear that you're having trouble with your computer. It sounds like you've tried a lot of possible solutions, but none of them worked.

    One thing you could try is to rebuild the Master Boot Record (MBR), which is a part of the hard drive that tells the computer where to find the operating system. Sometimes, the MBR can get corrupted or damaged, and cause the "Operating System not found" error.

    To rebuild the MBR, you'll need a Windows installation CD/DVD or a bootable USB drive. Here are the steps to follow:

    • Insert the Windows installation CD/DVD or USB drive into your computer and restart it.
    • Press any key to boot from the CD/DVD or USB drive when prompted.
    • Choose your language and click Next.
    • Click Repair your computer at the bottom-left corner of the screen.
    • Select the operating system you want to repair and click Next.
    • Click Command Prompt from the list of options.
    • Type the following commands one by one and press Enter after each:

    bootrec.exe /fixmbr

    bootrec.exe /fixboot

    bootrec.exe /rebuildbcd

    • When the commands are done, type exit and press Enter to close the Command Prompt.
    • Restart your computer and see if the error is gone.
    • Check Boot Order in BIOS: Ensure that your computer is set to boot from the correct drive. Access the BIOS/UEFI settings and make sure that the primary boot device is set to your system drive (where the operating system is installed). Save changes and restart.
    • Check for Disk Errors: Boot from the installation media again and go to the Command Prompt. Run the following command to check for disk errors: chkdsk /f /r C: Replace C: with the letter assigned to your system drive. This command will check for and fix any disk errors.

    Disclaimer: Running chkdsk can check the file system and file system metadata of a volume for logical and physical errors. To avoid any trouble for you, do not cancel or interrupt chkdsk, and back up important data.

    I hope this helps you fix the problem. If not, you may need to check your hard drive for physical damage or replace it with a new one.

    Your Sincerely

    Hahn - MSFT | Microsoft Community Support Specialist

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