When the operating system is missing or an operating system error is not found on your PC, you will not be able to start your computer or start a Windows system. A "Operating System Missing " or "Operating System Not Found" error message appears on your black screen. Faced with this problem, you will not receive any access to Windows 10/8/7.
We know that this error is due to one of the following causes:
Cause 1: Incorrect BIOS configuration
Because this error occurs when the BIOS can not find the operating system, first checking the BIOS settings is often a good solution. The BIOS setup may become incorrect due to power outages, hardware errors, or manual BIOS setup.
Cause 2: The BCD is damaged
Similar to the errors described in the BCD is missing and BCD is corrupted items, this error may also appear when BCD is damaged.
Cause 3: Faulty data cables
If the BIOS fails to detect the hard drive, faulty data cables are often to blame. Try unplugging, then reconnecting them or even replacing them completely and see if the problem persists.
Step 1: Test the hard drive
Follow the steps below to test the hard drive of a notebook using the HP Hard Drive Self Test.
- Connect the AC adapter to the laptop.
- Press the power button for 5 seconds to turn off the PC.
- Hold down the F10 key while pressing the power button to turn on the computer. Release the F10 key after displaying the text on the PC screen.
- When the BIOS Setup utility is displayed, use the right arrow key to select the Tools menu.
- Select Auto Test Hard Drive.
- Press the Enter key to start the test.
The automatic hard drive test will provide an estimated test time. A quick test, a full test, and a SMART test will be performed when you press the Enter key.If any of the tests fail, contact HP Support and Support for instructions on ordering a replacement hard drive.If all the tests succeed, the hard disk is not damaged. In general, HP will not replace a warranty hard drive that will not fail the HP hard drive self-test.
Many computer problems are related to slight hard disk failures. The complete portion of the HP hard drive self-test will repair software errors on the hard drive, but will not yield them. Once the test is complete, be sure to restart the PC to see if the test has solved the problem you may have with your PC.If all tests are successful, press the power button to restart the PC. If the error persists, go to step 2.
Step 2: Repair the Master Boot Record
The Master Boot Record (MBR) is a section of the hard disk used by the PC to boot the Windows operating system. If the MBR is corrupted, the PC will not start. The Windows Operating System Disc (OSD) that came with your HP notebook can be used to repair the MBR (Master Boot Record). Follow the steps below carefully to repair the MBR.
- Insert the Windows operating system disc into the optical drive (CD or DVD).
- Press the power button for 5 seconds to turn off the PC. Then press the power button again to turn on the PC.
- Press the Enter key when prompted to boot from the CD.
- In the Windows Setup menu, press the R key to start the Recovery Console.
- At the C: \> prompt, type FIXMBR, and then press the Enter key to continue.
- Press the y key and press Enter when asked if you want to write a new MBR.
- After the MBR writes, restart the notebook by pressing the power button.
Step 3: Reinstall the Windows Operating System
To reinstall the Windows XP operating system on an HP notebook, follow the instructions in HP Notebook PCs - Repairing or Reinstalling Windows 10/8/7.