: If you need to make USB the default boot device, you'll need to change the boot order permanently in the BIOS. Access the BIOS by restarting and pressing F1 . Navigate to the Startup menu. Under "Boot," use the arrow keys to highlight your USB drive. Then use the + or - keys to move it to the top of the boot priority list. Press F10 to save and exit. Your ThinkPad will now always attempt to boot from a connected USB drive first.
The P1 Gen 4 BIOS uses the format. Tools like UEFITool and ifrextract (part of the UEFI Toolkit) can: lenovo p1 gen 4 bios
: With the bootable USB drive inserted, restart your ThinkPad. As soon as you see the Lenovo logo, repeatedly press the F12 key (or Fn+F12 ) until the Boot Menu appears. From the list, select your USB drive (often named "USB HDD" or its brand, with a UEFI: prefix for Windows 11), press Enter , and your laptop will boot from it. : If you need to make USB the