How to configure your BIOS to allow for PXE network or USB booting (Lenovo Thinkpad P50)

In order to boot from the network, you will have to make sure that the BIOS has secure boot disabled, and the boot mode is set to Legacy. Additionally, it is a good idea to increase the memory for display and enable virtualization. Continue reading for a step by step guide for doing all of this.

Note: This guide is specifically for the Lenovo P50, but the concepts and terminology are going to be pretty similar for most computers.

Press Enter when you get to this part of the boot screen. (Note: this will likely be different for different computers. Other common keys are Esc, F1, F2, F8, and F12.... you will probably want to do a Google search for "shortcut key to enter bios for )

If you are too slow, or it starts booting into your existing OS, you can always press and hold the power button for about 5-10 seconds to do a hard reboot.

Press F1 to enter BIOS. (Again... do a Google search for your specific computer model)

Navigate to Config>Display

Change the memory to 512 (This has nothing to do with booting, but it is a good idea to look at this section to get the best graphics performance [if you are into that sort of thing])

Change the mode to "Discrete"

Press "Esc" to go back a level then navigate to Security>Virtualization (you won't be able to create and use a Virtual machine unless you do this; again... not related to booting but still a good idea to do while you are here).

Enable both Virtualization options

Navigate to Security>Secure Boot

Set Secure Boot to "Disabled"

Navigate to Startup>UEFI/Legacy Boot and set the boot mode to "Legacy Only"

Navigate to Restart>Exit Saving Changes

After the computer restarts, press F12 to get the boot menu (note: if you are too slow or the computer does not boot, do a hard reset by pressing and holding the power button)

Select PCI Lan or select the USB

About McKay Christensen

After having lived in Oregon, Alaska, and China for the past 10 years doing landscape design and English teaching, I have returned to my home state of Utah and currently work for a growing tech company.

In my free time I enjoy working on my website where I post tutorials and reviews (and anything else I think is geeky) and I also like to write songs for my Super English Kid Youtube channel.

My favorite things to do include anything with my wife and son. Hiking, camping, and photography (or anything else outdoors). Playing Ultimate Frisbee or Ping Pong. Listening to 60s, 70s, or 80s, music. 

Feel free to contact me using my contact page. I would love to hear from any of you!


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