Your laptop doesn't support legacy boot mode.  Use Microsoft windows creation tool or Rufus to create USB drive with UEFI
(Iam new to these computer stuff) Recently bought dell inspiron 3501 and thought about creating a bootable usb with multiple os setup (window 10 8.1 and 7) 10 for my laptop and 7 for my older pc with amd phenom processor(which I only use for watching movies and surfing internet). Created the usb with a winsub software tried it on pc it worked but  didnt on laptop on bootmenu there were 2 usb option clicked on both, black screen occured written EndEntire    and something else on other line. Tried some internet solution which said 1: USB must be mbr (it was) 2: USB must be fat32 (it wasnt the problem is all setup are above 4gb so winusb wont add them without NTFS) Thanks
Cant Boot with USB (inspiron 3501)