I have a Sony Vaio desktop and have tried at the Vaio screen (BIOS screen) holding down the F8 key, the F5 key, and nothing happens. I did a live support chat and the guy on the other end told me to reset the BIOS setup defaults and then try again. I did that, still nothing. My computer still just boots into regular Windows without giving me the advanced options screen. I need to boot into safe mode to run Driver Cleaner. Any ideas on why my computer is being so stubborn?