Disable Windows 10 Fast Start Up to Access UEFI Bios, Boot to Alternative OS etc
My troubles began on my Dell XPS 8500 with the Windows 10 update this fall of 2019. Fast Start Up was enabled once again... preventing me from accessing my Bios settings or booting to my Linux OS that I had just installed on a separate drive. Like most recommendations, I already tried the "Disable Fast Start Up" in Windows 10 power settings (choose what the power buttons do), but my Dell would not boot to Bios even with all hard drives physically removed from the PC! I even tried removing excess RAM sticks. Tapping F2 or F12 did nothing. Here's how I fixed it. TL;DR solution: If the above does not work, try a different keyboard. This was my main problem! Disable Fast Start Up in Windows 10 "Choose What the Power Buttons Do" options. Unplug all external USB hard drives / thumb drives. My bios was trying boot from those and stopped booting. Tap F2 or F12 as soon as you power up / boot up the PC, like you're starving at a vending machine. Holding the key...