Boot press ESC but can not find a U disk how to do?

using a U disk installation system is a prerequisite for the computer to boot from the U disk, most computer support in the power-on when press ESC to select the boot device. However, sometimes the boot press ESC will not find a U disk, which is related to the improper BIOS setup.

Solving method

into the BIOS inside, to ADVANCED--USB configuration--legacy USB support to change the value to ENABLE,F10 save exit, OK.

Legacy USB Support: This option means that in the traditional operating environment (such as DOS) to support USB devices, if the disable state, not enter the system will not be able to identify U disk, USB interface keyboard and other equipment.

In this case, the boot press ESC was unable to find the U disk because the legacy USB support in the BIOS setup was turned off and turned on. Small part of the proposal, before reloading the system, it is best to understand the BIOS detailed setup method.