Step 1: The first thing that you need to do is to go to settings and then from there you can click the gear icon given on the Start menu.
Step 2: Chose the option of Update and Security.
Step 3: Choose Recovery from the left menu
Step 4: Select the option of Restart Now given below the Advanced startup. The PC will restart a special menu.
Step 5: Select the option of Troubleshoot.
Step 6: Select the Advanced options.
Step 7: Click on the option of UEFI firmware settings. In case you don't see the icon, then press startup settings one more time. When your computer restarts, then press the keys F1 or F2 in order to launch BIOS.
Step 8: Select Restart.
Your system will reboot and then you will enter the BIOS mode.