Does Windows boot using UEFI? You can check the BIOS settings if the motherboard is set to boot UEFI. If yes, change it to legacy/BIOS.
If you do want or need to use UEFI, your USB stick must be prepared to be UEFI bootable. It must have a /efi directory that uses FAT16. I don't remember the exact procedure and tools, but searching this forum or googling for UEFI USB ... should help. Make sure the USB stick has the boot or bootable flag selected.
While it shouldn't matter, try booting on a USB-2 port (i.e. not a USB-3 port).
Then when booting, select the boot manager (often using F8) and select either UEFI:name_of_USB_drive or name_of_USB_drive depending on whether you want UEFI boot or regular boot.
Can you describe how far you get into the boot process? Do you get a grub menu? Try pressing the left Shift key while booting from USB stick.
Asus Sabertooth X79, i7 3930K CPU, 8x4GB Kingston DDR3 RAM, Noctua NH-D14 CPU cooler, Sapphire 7770 GPU, PNY Quadro 2000 GPU, Asus Xonar Essence STX, Sandisk Extreme 120GB SSD + various HD, Corsair 500R case, SeaSonic 660W Gold X PS