How to Fix No OS Installed Error on Startup?

[Steven Spielberg]

After building my PC and powering it on for the first time, I am greeted with a black screen stating no os installed. I have my Windows bootable USB plugged in, but the BIOS doesn't seem to be prioritizing it automatically, and I'm stuck in a loop.

 

[AlexVale]

@Steven Spielberg, check bios settings, recent 2026 updates show issues with usb boot priority.

 

[Audry]

check the boot order in bios, some systems require secure boot to be disabled for usb boot to work properly, also ensure the usb is set as the first boot device.

 

[Lisa]

lowering secure boot settings should help, also try setting the usb as the first boot device in bios settings.

 

[natalia]

try setting the usb boot priority in bios to the top, also ensure secure boot is disabled to avoid any issues with usb boot.

 

[Olivier]

check boot order and secure boot settings, recent bios updates can cause issues with usb boot priority, try updating bios to latest 2026 version for better compatibility

 

[Emmyjohn]

check the usb bootable drive is properly formatted as fat32, some systems may have issues with other formats.

 

[dasylisa]

check the boot order and secure boot settings, as some systems require specific configurations for usb boot to work properly, also ensure the usb is formatted correctly.

 

[Lucifer]

i think the issue lies in the bios settings, lowering secure boot settings and setting the usb as the first boot device should help, also check if the usb is properly formatted as fat32.