When the computer is booted, if the BIOS (primary input / out system) fails to find an operating system, error messages.
The operating system not found error or error such as:
Missing Operating System
The setup does not detect any hard drives installed on your computer.
The message is displayed in black windows and prevents me from accessing the desktop.
Therefore, the situation is scary and quite complicated. However, like many other Windows errors, this one can be fixed.
Below are the main reasons why Windows operating systems are missing.
The computer input / output system (BIOS) does not detect the hard disk drive.
The hard disk is damaged or damaged.
The Master Boot Record (MBR) on the hard drive is damaged. Note that some third-party programs or disk operations may damage an MBR.
An incompatible partition is marked Active.
A partition containing MBR is no longer active.
There are a couple of ways you can fix Operating System errors Not found Windows errors.
Try Hard Drive Problems:
There is a Hard Disk Self Test in the BIOS to verify the integrity of the hard drive. Users often use this test for regular system maintenance.
To perform the test, follow the steps below:
Step 1: Enter BIOS mode by following the instructions for your system specific. Go to the Diagnostics tab and select the Basic Hard Drive Self-Test option.
Step 2: Press the Enter key to run the test, and you can perform a quick and comprehensive inspection. The system will provide a detailed test status.
As a result, you can see if any of your hard drive components have failed and are repaired immediately.
Reset BIOS: If the hard drive is working properly, then the next thing to do is check the BIOS settings and make sure they are correct. Incorrect BIOS settings can result in the operating system not finding an error. Thus, we need to reset the default settings to get rid of this error.
Step 1: Remove all external drives connected to your system and open the BIOS setup. In the BIOS windows, you will see the Exit tab.
Step 2: Select the Exit tab and enable the "Load Optimal Defaults" option. The option can load optimized defaults, Load default setups, or get default values depending on the system you own.
Step 3: When the settings are successfully loaded, select the Save Changes and Exit option, and the BIOS will be reset to the default settings.
While using this method, make sure you follow the correct steps for your system.
Adjust MBR with CD / DVD installation: Incorrect operation and viruses can damage the MBR and cause the Operating System Error not found. Like not booting Windows OS, you will be stuck unless you fix the MBR. If you already have a Windows Disk Installation, then follow the steps below:
Step 1: Insert the disc and enter Boot mode. Go to the Windows Setup menu and start the Command Prompt Recovery process.
Step 2: Enter C: \> and type "bootrec / fixmbr" and press Enter. Press Y for yes and press enter again when you get the prompt to write a new MBR.
When the writing process is complete, restart your PC and see if the problem is fixed or not.
Hopefully, one of these solutions will work for you. If all else fails, try taking your computer to a dedicated computer repair shop.