I installed Windows 7 on one hard drive and Windows XP on another hard drive. I want to know how I can select either OS at boot up other than booting into my BIOS and having to select the hard drive that the OS is on. Is there a key that I can press at start up that will allow me to boot into my desired OS without ahving to tell the BIOS which driver to boot to? My mobo is: MSI MS-7816, H87-G43. Im running an Intel i7-4770. Thank you experts.