Then you may not have realised how to access the advanced boot options - previously on 7 and earlier systems from the F8 key.
If you press the windows key + C and then click SETTINGS and then Power, then hold the shift key and click restart you will be presented with the screen on the top left of my image.
From there you may proceed to the various options.
Please note that depending on your computer and its system, whilst your screens may be slightly different, in the main, the options will be the same.
If the computer had 8 installed on an upgrade, and the firmware was BIOS based rather than the UEFI found on all computers, on which 8 was pre-installed and bearing the Microsoft Certified for Windows label, then that option will not be present and the BIOS setup is accessed in the normal way - F2, Delete, for example, on boot.
On systems where 8 is pre-installed, after three boot failures the system normally detects this and you are automatically presented with the options screen
Edited by Macboatmaster, 20 February 2013 - 07:41 PM.