How To Fix Windows’ Operating System Not Found Error

As computer users, you may know sometimes your machine can show error messages. “Operating system not found” can list as one of the scariest error messages you can see on your device screen.

As scary as this error may seem, you have ways to fix it on your own with simple and effective tips.

If the “Disk Error: Operating system not found” error displays, it means that your computer is having trouble finding or loading the operating system. This can have several causes, including a corrupt boot file, a missing partition table, or a faulty disk drive.

Top Summary: BIOS settings and binary-code errors may seem confusing for the everyday computer user. But fixing the operating system’s error is simpler than you may believe. And you’ll need to check BIOS, codes, and cables in the process. Don’t fear, though, since SalvageData experts create this guide with easy and effective solutions.

Major causes for an “operating system not found” error

Error in BIOS configuration

Usually, the OS (operating system) error happens when BIOS can’t find it. Therefore, checking for a problem on BIOS is a logical step. Issues with BIOS configuration occur because of power outages, errors with the hardware, or during manual configuration.

Damage cables

If there is a bad or inexistent connection between BIOS and hard drive, you may have a problem with the computer’s data cables.

BCD error

The binary-code decimal can be faulty as well, leading to an OS error.

Summary: OS errors hardly have a human factor to blame. And solutions vary from simple cable switches to tech expert assistance. But, in the middle, you can find that the cause of such errors is one that you can fix on your own.

Fixing operating system not found error

You can apply the following solutions for most Windows updates (XP, Vista, 7, 8, 9, 10) and achieve the expected result. But, if by the end none works, you should then look for professional help to try recovering both your computer and the data in it.

Before following the solutions, you may try to restart your computer. A minor error can be the reason for the message, while nothing is actually wrong. If you keep seeing the message after that, though, one of the following fixing methods can restore your computer.

Important: some solutions may require a Windows setup file, CD, or DVD to recover the system.

Don’t forget that you can lose your data when repairing the OS of your device. If you want to avoid it and recover your data, find an expert near you that will recover the data and help you with the next steps.

Solution 1: Check BIOS

You can start by checking the booting order to make sure the operating system installed is the first one listed. 

You can also reset BIOS for the default settings. Enter the BIOS settings when restarting the computer. Enable the default option, save and exit.

Solution 2: automatic repair

Windows has a setup for automatic repair that may help you restore the OS. It all depends on the cause of your computer’s “missing operating system” error.

To access Windows Automatic Repair, you need an install disc. Start your computer from the install disc and set up all configurations (as language and time).

Click on to repair your computer and select troubleshoot and advanced options.

The last step is automatic repair. Click on it and select the operating system.

Solution 3: Check the hard drive

Turn your computer on while holding the F10 key. On the test screen, open the BIOS setup and go to the tools menu.

Select Hard Drive Self Test and run it. In the case it fails, you may look for a replacement if your device is still under warranty. If not, you may find a specialist that can help you recover your computer.

Solution 4: fix the BCD

Since a BCD error can cause a missing operating system, trying to fix it is a possible way to recover the OS.

Using the Windows install disc, go to repair your computer. Select the Windows installation drive (usually disc C).

Click on Command Prompt and write the bootrec /rebuildbcd command. 

Solution 5: reinstall OS

If all the above fail, you will need to reinstall the operating system. This will erase all the data on your hard drive, so be sure to back up any important files before proceeding.

Summary: “Operating System Not Found” or “Missing Operating System” can happen at any time. So, make sure you keep an updated backup of your data. As a common issue for computer users, the problem solutions vary and are easy to do. 

Make sure your data won’t get lost while recovering your computer’s operating system. Contact a SalvageData expert and learn how you can keep your data and restore your device.