Can't boot from bootable USB stick

100% solution to this problem!

1. Turn off your PC
2. Plug in USB bootable device
3. Go to BIOS
4. Set Boot device priority to 1st removable
5. Open option "Hard Disk Drives" and set Removable to be the 1st and HDD 2nd drive
6. This work only if USB is pluged in before PC start UP and BIOS can see yours USB. Now when I have no Flash drive in, bios show only HDD as 1st and no option to change.
7. Save and exit BIOS