You can easily access BIOS settings on classical PCs by pressing a BIOS entry key (F2, F10, Del, ESC) to interrupt the boot process. However, this doesn't work on Windows 10 and Windows 8.1/8 anymore, because they usually run on newer machines with UEFI BIOS and the boot process is too fast to interrupt. It confused many people how to access BIOS in Windows 10. Now here show several options to access UEFI BIOS on Windows 10 PC/laptop/tablet.
Step 1: Press Win key on your keyboard to bring out Windows 10 Start menu. Then click Settings.
Step 2: On the Settings panel, select Update & security.
Step 3: Select Recovery and click Restart now.
Step 4: Windows 10 will quickly restart and display the blue screen. Choose Troubleshoot.
Tips: On the screen above, you can set your Windows 10 PC/laptop to boot from a USB drive or CD/DVD drive by choosing Use a device.
Step 5: On the next screen, select Advanced options.
Step 6: Many options display. Select UEFI Firmware Settings option.
Step 7: Next, click Restart to restart your PC/laptop once again. Then Windows 10 will restart and boot to UEFI BIOS.
In Windows 10 desktop, click Win icon to bring out the Start menu, and click Power. Then click Restart while pressing and holding the Shift key on your keyboard.
Alternative: If you can't sign in your Windows 10, you can also click Power icon on the sign in screen. Then click Restart while holding the Shift key.
Then Windows 10 will immediately restart and boot to the Choose an option blue screen, on which select Troubleshoot > Advanced Options > UEFI Firmware Settings, and then click Restart to restart your PC/laptop so that Windows 10 will boot to UEFI BIOS setup.
If you are running Windows 10 on a surface tablet, you have a quicker way to access its UEFI BIOS, by pressing a few buttons.
Step 1: Make sure your surface tablet is powered off. If not, shut down the surface right now.
Step 2: Press and then release the Power button while pressing and holding the Volume Up button on the left side of the surface.
Step 3: Release the Volume Up button when your surface logo is displayed. Then UEFI BIOS setup should display.
Tips: This quick way only works on Microsoft surface tablet.
Conclusion: When you successfully access to UEFI BIOS in Windows 10, you can make some changes to your PC/laptop/tablet, such as changing the boot order to make your device boot from a USB device or CD/DVD drive.