Cant access bios
So i have a asus z270e mobo i was abke to get into the bios at the initial powerup with my logitech usb keyboard. Now that win 10 is installed and i have been using the new rig the asus app has a firmware update. I cant access the bios at all now neither with f2 or the del button. So when i try to launch the firmware update its the same issue del and f2 wont work to initialize the bios update. The keyboard lights up fine but it wont respond for the bios. I have seen a few threads regarding this to enable usb legacy once in the bios but i cant get in to do so. Is there a specific usb port i should be using? i dont have a old style keyboard to use. Taking out the mobo battery is that my only option? Thank you.