No bootable devices

Christian, if the solutions above did not work and the hard drive is still detected in BIOS, it is recommended to re-install Windows on your disk.

If you're fine with losing any remaining files, you can proceed with a clean install of Windows 10 from a Bootable installation media drive.

1. To create a Bootable installation media, you will need a different computer (Working one) to do this.

a. Plug in an empty USB drive (min 8GB) to a working computer.

b. Download the Windows Media creation tool from the link below.

https://www.microsoft.com/software-download/win...

c. Run the Media creation tool and Uncheck the Use the recommended options for this PC box to select the appropriate language and edition.

d. Select the bootable USB flash drive with at least 8GB of space that you have prepared to use, then select Next. Reminder: any content on the USB flash drive will be deleted.

e. The USB device will be formatted, and the Windows installation media will be placed on the USB flash drive.

f. The USB flash drive will now serve as bootable Windows 10 Installation Media. Select Finish.

Once ready, You may now install Windows 10 on your problematic device from the installation media you created on the USB flash drive.

g. Attach the USB flash drive to the PC on which you want to install Windows 11.

h. Boot the USB drive (usually F2 or Del or esc). (You can refer to the Manufacturer's website to see how to boot the USB on your PC)

I. On the Windows Setup page, select your language, time and keyboard preferences and then select Next.

J. Select Install now.

"For detailed steps, please see the article posted by Andre De Costa."

click the link below.

https://answers.microsoft.com/thread/aef0ae63-2...

I hope this information helps. If you have any questions, please let me know and I will be happy to help you further.

Best regards,

Gunasekar N

I’m not able to change it it’s grayed out

Hello Christian,

Thank you for reaching out to the Microsoft Community and I'll be glad to assist you today.

I understand that you are encountering a 'No Bootable Devices Found' error. This issue can occur if your hard disk is not detected or if there have been recent changes to the BIOS settings. Sometimes, it might also be due to a corrupted operating system or installation media. To resolve this, first check your BIOS settings to ensure everything is configured correctly. If the problem persists, you may need to reinstall the operating system on your hard disk.

1. Turn Off your PC. (Press and hold the power button for 15 seconds to turn off your computer) then, turn it On.
2. when you see your manufacturer logo (Dell), press the F2 key repeatedly.
3. In the BIOS menu, System information, see if your Hard Drive is detected.
4. In the Boot Sequence, change the Boot List option to Legacy and click Apply.
5. Next select Secure Boot, and make sure Secure Boot is disabled.
6. Once the changes are made, click exit.

After the restart, see if the PC boots normally to Windows. If that doesn't work, it is recommended to create a Bootable installation media and install Windows on your hard disk.

Perform a clean install by booting from install media (DVD or USB thumb drive)

"See the article posted by Andre Da Costa to perform a re-installation of Windows 10 on your hard drive."

https://answers.microsoft.com/thread/aef0ae63-2...

I hope this information helps. If you have any questions, please let me know and I will be happy to help you further.

Best regards,

Gunasekar N

Do I need another window device to do the reinstalation

Christian, thank you for your reply.

It seems that 'legacy boot' is greyed out and you are unable to make changes.

1. Did you make sure the function 'Security Boot' is disabled in the BIOS menu?

You cannot switch from Legacy BIOS mode to UEFI BIOS mode until the secure boot is enabled.

2. Also, if Intel PTT is enabled, you will find the legacy boot option might be greyed out. In the Security tab, ensure PTT is disabled.

See, Legacy Boot is greyed out in BIOS article for your reference -

https://www.thewindowsclub.com/legacy-boot-is-g...

Standard Disclaimer: This is a non-Microsoft website. The page appears to be providing accurate, safe information. Watch out for ads on the site that may advertise products frequently classified as a PUP (Potentially Unwanted Products). Thoroughly research any product advertised on the site before you decide to download and install it.'

I hope this information helps. If you have any questions, please let me know and I will be happy to help you further.

Best regards,

Gunasekar N