Because of Intel's specification issue, when only use one memory module is used, please install the module in the upper DIMM slot. Please see the below picture:
Secure Boot function in the BIOS menu. 

F7 into BBS screen and than select UEFI : your USB flash driver device. 

F1 to continue and the press Del into BIOS setup menu. 
Exit page and select Load Defaults Settings option, and than select Yes to load optimized defaults.

Save Changes and Exit option, and than select Yes to save configuration and reset 
Please note if you using Windows 7 operating system, please remember change back the Windows 7 setting in the OS Selection function.
Because of specification limitation, this model now has only support for Windows 7 32-bit.