First option, click and hold on the shift button and click on new restart and
follow the steps as descriped below
i.e click Start, click the arrow next to the Lock button, and then click Restart.
or
Windows 8 To enter Setup Utility:
Open the Charm Bar by pressing Windows Key-C
Click on Settings
Click on Change PC Settings
Click on General
Scroll to the bottom and click on Advanced Startup -> Restart Now
Click on Troubleshoot
Click on Advanced Options
Click on UEFI Firmware Settings
Click on Restart
To access the Boot Menu:
Open the Charm Bar by pressing Windows Key-C
Click on Settings
Click on Change PC Settings
Click on General
Scroll to the bottom and click on Advanced Startup -> Restart Now
Click on Use A Device
Click on Boot Menu
Windows 8.1 To enter Setup Utility:
Open the Charm Bar by pressing Windows Key-C
Click on Settings
Click on Change PC Settings
Click on Update and Recovery -> Recovery
Scroll to the bottom and click on Advanced Startup -> Restart Now
Click on Troubleshoot
Click on Advanced Options
Click on UEFI Firmware Settings
Click on Restart
To access the Boot Menu:
Open the Charm Bar by pressing Windows Key-C
Click on Settings
Click on Change PC Settings
Click on Update and Recovery -> Recovery
Scroll to the bottom and click on Advanced Startup -> Restart Now
Click on Use A Device
Click on Boot Menu