If you want to install the operating system via a USB drive, you need to set the BIOS to boot from the removable device. This is a little difficult for beginners, and here's a little bit of a way to set up ASUS BIOS startup.
Method/Step
Open the computer host, in the computer startup process, see the screen prompts "Please enter the Del to Setting" when press the DEL key on the keyboard, enter the ASUS BIOS setup interface.
With the left and right key options on the keyboard "boot" tab, press ENTER, select "Boot Device property" (Boot device priority), press ENTER again.
This project is to set up the system boot storage sequence, for example, when you install the operating system to boot from the CD drive, you must put the 1st Device priority set to become your optical drive, the map is set on the hard disk, so when the system boot the first boot is hard, we recommend that if not to boot from the CD drive , the first boot setting becomes a hard drive, and the other startup items are set to disable so that the system starts relatively quickly.
When Setup is complete, press ESC to return to the main interface window, press the left and RIGHT arrow keys on the keyboard to the Exit tab, and press ENTER to confirm.
Save the BIOS program settings. After setting up the BIOS, save exit, the interface of the options means: from top to bottom is saved after the exit BIOS, do not save the BIOS, quit the previous settings do not quit the BIOS, load just the settings, load the factory settings. Quit restarting the computer after the save is complete.