How to fix “Operating System Not Found” error in Windows 10?

How to fix “Operating System Not Found” error in Windows 10?

Hi. I have a serious problem with my Dell computer. A few days ago my system started taking a long time to boot (from Hibernate) – up to 30 minutes. Today it took way too long to wait for the login screen – it made me look for the cause of the problem. I scanned my computer with an antivirus, but found nothing. A few hours after the scan, my PC hung up and I had to restart it – then I got the error “operating system not found”. I restarted the system, but the information about the lack of the operating system was also displayed. It scared me. Why is this error showing up? Can You help me? 

UNDERSTAND IMMEDIATELY

• Ways to fix “Operating System Not Found” error in Windows 10
• Method 1. Repair MBR / DBR / BCD
• Method 2. Enable / Disable UEFI Secure Boot
• Method 3. Activate the Windows partition
• Prevent websites, ISP and other parties from tracking you
• Recover lost files quickly

FIX IT NOW! 

To repair a damaged system, you need to purchase a licensed version of Reimage .

“Operating System Not Found” is an error that occurs when the computer boots up. The message appears on a black background and prevents access to the desktop. Therefore, the situation is terrible and somewhat complicated. Like many other Windows errors, this one can be fixed.

The problem may appear on any version of the system. Most of the current reports, however, come from Windows 10 users. In many cases, this error is preceded by computer slowdowns, program crashes, and similar problems. Additionally, before this error occurs, the system may initiate a self-repair and offer the option to restart or open advanced options. If the computer owner chooses to restart, the system generates an “Operating System Not Found” error that doesn’t get you anywhere. You can check Computer Accessories that you should have.

Operating system not found. Reboot and select proper boot device.

This error can appear for several reasons, including:

• damage to the Master Boot Record (MBR),
• DOS Boot Record (DBR),
• Boot Configuration Database (BCD),
• system partition deactivation.

By the way, it may turn out that the system / BIOS cannot detect the Windows installation disk or the BIOS settings may be set incorrectly. Therefore, if you see a black screen with the message not found operating system during system boot, it is time to take action and repair the system.

There are several ways to fix the “Operating System Not Found” error in Windows. Our team has prepared a detailed guide and explained the most common ways to get rid of the problem.

Ways to fix “Operating System Not Found” error in Windows 10

To repair a damaged system, you need to purchase a licensed version of Reimage .

As we already mentioned, this error can be triggered by various problems. Therefore, in order to optimize it to play games, you have to find the source of the problem and fix it.

Method 1. Repair MBR / DBR / BCD

To repair a damaged system, you need to purchase a licensed version of Reimage .

NOTE: This method requires bootable Windows installation media on DVD or USB.

1. Turn on the computer with the No Operating System Founderror and insert the DVD / USB drive.
2. Press any key to boot from external drive.
3. When the Windows Setup page appears, set the keyboard, language, and other required settings, then press
4. Then select Repair your computer.
5. On the Choose Optionsscreen , click 
   
6. Select Advancedand open Command Prompt.
7. In the Command Prompt window, type the following commands and press Enterafter each of them:
   exe / fixmbr
   bootrec.exe / fixboot
   bootrec.exe / rebuildbcd
8. Finally, restart your computer.

Method 2. Enable / Disable UEFI Secure Boot

To repair a damaged system, you need to purchase a licensed version of Reimage .

You may receive this error when you have UEFI configured to boot into Legacy mode. This is because most Windows 10 computers come with firmware installed and Secure Boot installed, and a system installed on a GPT partition can only boot in UEFI mode. In this case, you should change the boot mode from Legacy to UEFI, or disable UEFI and secure boot. For this purpose:

1. Press the power buttonbefore the logo appears.
2. Then press F2to open the BIOS menu.
3. Select the Securitytab and disable Secure Boot.
   
4. Next, select the Advancedtab and enter System Configuration.
5. Set Boot Mode to CSM Boot.
6. Press F10to save changes.
7. Finally press F12and select the source from which you want to boot the system.

Method 3. Activate the Windows partition

FIX IT NOW!

To repair a damaged system, you need to purchase a licensed version of Reimage . You must know if water spills on your pc or laptop.

If the previous methods did not help, the last thing you can try is related to the system partition. If it has been disabled, it’s time to enable it. For this purpose:

NOTE: you will need a bootable Windows installation disc in the form of a DVD or USB.

1. Start the computer with an Operating System Not Founderror , and then insert the DVD / USB.
2. Press any key to boot from external drive.
3. When the Windows Setup page appears, set the keyboard, language, and other required settings, then press
4. Then select Repair your computer.
5. On the Choose Optionsscreen , click 
   
6. Select Advancedand open Command Prompt.
   
7. Type diskpartin the Command Prompt window and press
8. Then type the commands list diskand disk n (n is the disk number), pressing Enter after each.
9. Type list volumeand don’t forget to press Enter .
10. Find your Windows partition and type volume n(n is the partition number).
11. To activate the selected partition, type activein the Command Prompt window and press
12. Close everything and restart your computer.

Fix all problems automatically

The team does everything to help its users solve problems with their computers. If you don’t want to use manual troubleshooting methods, please use automatic software. Get to know the current market situation for Bull Run. All of the following applications have been tested and are recommended by our experts. These tools are listed below:

Still having problems?

If Reimage was unable to solve your problems, please contact technical support. Please also provide any information you need to know about your problem, You can use BNB for payment method in many countries.

Reimage – a patented program that specializes in repairing Windows. It will diagnose your computer and scan all files, libraries and registries damaged by viruses. Get ready for Metaverse which is future. This patented repair application uses a database of 25 million components that can replace any damaged or missing file on the user’s computer. To repair the damaged system, you need to purchase the licensed version of the Reimage malware removal program.