Windows 10: Boot Device Not Found Please install operating system

This has been a constant issue for the last several weeks. Resetting the BIOs to factory settings is only a temporary fix. How can this problem be resolved?

:)

 

Error: "An operating system wasn't found. Try disconnecting any drives that don't contain an operating system"

Hi Stephen,

I realize the inconvenience you are facing in accessing the operating system. Now that you have me with you let me take care of this.

Do let us know if you are able to see Windows 7/ Windows 10 operating system while rebooting the device?

As you are unable to boot the operating system, this issue might have occurred when the boot files are missing or corrupted.

I suggest you re-built the boot rec by following the below commands and check if it helps.
You will have to use Windows 10/7 installation media to follow the steps to boot into Recovery Environment and try to rebuild BCD.

Step 1: I suggest you to create an installation media for
operating system using the media creation tool

If system boots to Windows 10:
Installing Windows 10 using the media creation tool

If system boots to Windows 7: Download Windows 7 Disc Images (ISO Files)

Step 2: After preparing the installation media, insert it hard reboot the device and follow the below:

• Boot into Windows Recovery Environment using the Windows 10/7 installation media.
• Click on Repair your computer.
  
• Click on Troubleshoot and in the Advanced options.
• Select Command Prompt. Type the following commands into the prompt and press Enter key after each command.

• bootrec /fixmbr

• 
  bootrec /fixboot
  
• 
  bootrec /scanos
  
• 
  bootrec /rebuildbcd
  

5. Restart the computer.

NOTE: Modifying BIOS/ complementary metal oxide semiconductor (CMOS) settings incorrectly can cause serious problems that may prevent your computer from booting properly. Microsoft cannot guarantee that any problems resulting
from the configuring of BIOS/CMOS settings can be solved. Modifications of the settings are at your own risk.

Hope it helps. Reply to the post with an updated status of booting the operating system for further assistance.

Thank you.

 

Unable to boot the operating system to desktop after the Anniversary Update on Windows 10

Hi,

Now that you have me with you let me take care of this.

Provide us additional information to assist you better with this issue:

• What is the make and model of your computer?
• What is the complete error message/ error code of this issue?

As a workaround I suggest you to unplug all the external devices connected to your computer, hard reboot the device and check with the status of this issue.

If the issue still persists, try the below troubleshooting steps as the boot files of current operating system might got corrupted.

I suggest you to download Windows 10 ISO file, create an installation media from other working computer to perform Startup Repair of the computer that you are unable to boot.

Using ISO file to perform Startup Repair will allow the device to boot the system to Windows Recovery Environment and tries to repair the device.

Step 1:
I suggest you to try Startup Repairing the Windows and check if it helps.

Download the Windows 10 ISO and create a Media Creation tool and then perform Startup Repair.

Refer to the following link: Installing Windows 10 using the media creation tool

(Refer to the section "Installing Windows 10 using the media creation tool” in the above article for creating the tool).

Step 2: After creating the tool perform Startup Repair.

I would like to inform that, if your Windows 10 is not able to boot or startup, Startup Repair will come into action and try to diagnose and fix the issue. It will scan system files, registry settings, configuration settings and
more and try to fix the problem on its own, automatically.

Perform the Startup Repair:

• When your computer starts, wait for the manufacturer logo to check the option for boot menu, it will usually be
  F12.
• The boot menu key might differ with each manufacturer. If you are unable to find the boot menu key, you may refer the user manual.
• Restart the computer, when the manufacturer's logo is displayed, keep pressing the
  Boot menu option key to enter the boot menu and change the boot option to
  CD\DVD ROM.
• After you boot your computer using Windows 10 DVD, a black screen appears with gray text "Press any key to boot from CD or DVD". Press any key.
• Select the correct time and Keyboard type.
• Click Repair your computer in the lower left corner
• Click on Troubleshooting, advanced option and then click
  Startup Repair.

Hope it helps. Kindly update the status of accessing/ booting the operating system for further assistance.

Thank you.

 

' choose an operation system to start"

Hi Bob,

To better assist you, do let us the complete message that you receive.

Sometimes, this could be due to two operating system installed in your computer. Just to make sure this is not the case, I suggest you to try the steps below:

1. Press Windows key + R.

2. Type msconfig and press enter.

3. Click the "boot" tab and check if there are any other operating system listed.

4. In addition, change the timeout time to 3 seconds(default)

Let us know the result, we will be glad to help if you need further assistance.