reboot and select proper boot device or insert boot media in selected boot device and press a key

[harryxuds]

Hi, I am totally new and just assembled my first desktop. I want to install Ubuntu and such but when I turn on the machine, the message in the title show up. What should I do to dismiss it? I have only SSD installed. Thanks in advance!

 

[R_1]

the motherboard manual will have the BIOS navigation instructions. you need to enter the BIOS and tell the motherboard to boot first from the USB/CD/DVD wherever ubuntu installer is, second to the SSD.
your system is attempting to boot to a device that has no information and is hitting the wall and asking instructions.

you will need a ubuntu installer inserted into the computer and selected as the first boot device.

in the motherboard manual look for the boot device trigger, on my motherboard I hit F8 at boot and my system asks which device to boot to and I can select the right one, your system may have a similar feature and you can manually select the boot device after hitting the proper trigger.
once the OS is installed set the proper boot order in the BIOS