How to I access Bios on Lenovo?

My Lenovo IdeaPad Y570 currently has 32 bit windows 7. I have the USB flash drive boot disk for 64 bit that I would like to install. I can't open bios from the F2, F12, Esc, Del, or "Novo" button located next the power button, when prompted. Is there another way to boot using the flash drive? Is there another way to install 64 bit windows 7 on a 32 bit without using bios?

Unplug your hard drive, then boot up, when it booted into the installer plug your hard drive back in and install