Guide to Fix the ‘Operating System Not Found’ Error on Windows 10
by Peter Anderson WriterWindows 10 users experience a variety of error codes, glitches, and problems on the operating system. But out of all the errors, the most terrible or dreaded error to show up on the screen is ‘Operating System not Found.’ It is a dreadful sight to see, but the bitter truth is that it is most likely to happen at some point. Despite this error, your data on the system remains safe, and you can still get access to your most important files.
If you
see this error code on your PC screen, use the following guide to solve this
problem:
Check the Basic
Input/Output System (BIOS)
In the BIOS, you need to make sure that your machine recognizes
your hard drive, and the drive on which Windows OS is installed is programmed
as the Preferred Boot Drive. The entering procedure in the BIOS varies from
manufacturer to manufacturer. But the most common keys that you’ll need are to
press one of the Function keys, Escape, or Delete key. You will find a message
appearing on your screen, advising you about the boot process’s correct access
key.
Please note that the BIOS menu also varies from device to
device. Using your keyboard, you need to locate the Boot tab along the top of
the screen. Within the Boot tab, use the following steps:
1.
Highlight the Hard Drive and press the Enter key. Ensure that
the Hard Drive is listed above USB Storage, Removable Devices, CD/DVD\BD-ROM,
and Network Boot.
2.
Adjust the order using the (+) plus and (–) minus keys.
If you don’t find the hard drive listed, then try to reset the
BIOS to default. The procedure to reset the BIOS starts at the bottom of the
BIOS menu. In the menu, you will find a key for Setup Defaults or Reset BIOS.
Press either of the Function keys (that works for your PC) and confirm your
decision when prompted. To save the settings, restart your system. Now you are
ready to move onto the next step.
Fix the Boot Records
Typically, Windows relies on the Master Boot Record (MBR), DOS
Boot Record (DBR), and the Boot Configuration Database (BCD) to boot your PC or
laptop. If either of these three records gets damaged or corrupted, then the
user encounters the “Operating system not found” error message on their system.
Fortunately, you can fix them using a removable Windows installation drive. We
would recommend you to use Windows Media Creation Tool for this procedure.
Depending on the system you use, you’ll have to use a single key or change the
boot order from the BIOS menu during the process. Follow these steps to
continue:
1.
You’ll find a Windows Setup screen where you have to enter your
preferred language, keyboard, and time format.
2.
Then, click on Next and select Repair Your Computer.
3.
Go to Troubleshoot and click on the Advanced options.
4.
Select Command Prompt and enter the following commands:
bootrec.exe /fixmbr
bootrec.exe /fixboot
bootrec.exe /rebuildbcd
Don’t forget to hit the Enter key after each command line, and
each one of these will take a few minutes to complete. Once the procedure
completes, restart your PC and check if it boots successfully.
Enable or Disable UEFI
Secure Boot
Every Windows system has a UEFI firmware and Secure Boot
enabled, but it fails to work properly in many cases. And the reason for its
failure could be that your Windows 10 system is running on an MBR disk. It will
disable your device from booting in UEFI mode. This is why it is crucial to
enable or disable the UEFI Secure Boot and check if it is good enough to make a
difference. You have to make the adjustments in the BIOS menu’s Security tab.
Then, click on the Secure Boot option.
Activate the Windows
Partition
One of the reasons you see the ‘Operating System not Found’
message could be that the Windows partition has disabled. But, using Windows’
native diskpart tool, you can fix the issue. To go through the procedure,
you’ll need the Windows installation media USB, and then follow the steps given
below:
1.
Turn on your PC and boot from the tool.
2.
Then, enter your language preferences, etc., click on Next.
3.
Select Repair Your Computer, and go to Troubleshoot. Click on
Advanced Options and select Command Prompt.
4.
In Command Prompt, type “diskpart” and hit the Enter key.
5.
Insert “list disk” and press the Enter key. This will bring you
a list of all the disks attached to your system. Note down the disk number you
need.
6.
Then, type select disk [number]. Replacing [number] with the
disk number mentioned earlier, and then, hit the Enter key again.
7.
Now type list volume and press Enter to see all the partitions
on the disk you selected.
8.
Find out the partition Windows is installed on and again note
down the number.
9.
Then, type select volume [number], again replace [number] with
the number you noted.
10.
Insert “active” and press the Enter key. Restart your desktop to
check the final results.
Despite using all the techniques mentioned above, if you
continue to see the ‘Operating System not Found’ message, you must visit an
expert or a computer repair shop.
Graccey Leio is
a self-professed security specialist; she has been manufacture the people aware
of the security threats. Her obsession is to write about Cybersecurity,
cryptography, malware, societal engineering, internet and new media.
She writes for McAfee security products at mcafee.com/activate.
Source : Operating
System Not Found
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Created on Sep 10th 2020 04:54. Viewed 391 times.