Based on your search query, it looks like you are looking for information regarding the BIOS for the Lenovo ThinkPad P1 Gen 4.
Fix: Go to Security > Secure Boot > Disable. Then go to Startup > UEFI/Legacy Boot > Set to "Both". Note: Booting in Legacy mode may break your existing Windows install. lenovo p1 gen 4 bios
When the logo screen is displayed, press F1 or Fn+F1 to enter the BIOS menu. Based on your search query, it looks like