I bought a Lenovo Thinkpad X131e Chromebook on eBay unaware that Google was no longer supporting it with updates. I was only able to update it to Chrome OS 69.
Since this laptop is to be donated, I wanted an OS that will continue to receive updates, so I set about installing CloudReady.
To install CloudReady, I need new "BIOS". I needed to install the custom UEFI firmware from MrChromebox.tech
To be able to install the custom UEFI firmware, I had to (a) enable Developer mode and (b) set write-protect to off.
I knew about (a) but not about (b).
Step (a) for the x131 is unusual [https://www.chromium.org/chromium-os/developer-information-for-chrome-os-devices/lenovo-thinkpad-x131e-chromebook#TOC-Introduction1 ]
I only learned about step (b) from reading https://www.reddit.com/r/archlinux/comments/2r1ape/turning_my_x131e_from_a_chromebook_to_an_archbook/ However, unlike the fellow TheAlbertJen in the linked post who wanted to put Arch Linux on his x131e, I wanted CloudReady because it is more accessible to the regular folk as this laptop will be donated.
Step (b) requires quite a bit of disassembly of the x131e. Even though I removed the keyboard screws, I did not remove the keyboard's two flex cables. Anyway, I set to the write-protect switch on the motherboard to off and put everything back together again.
I did not need an external USB keyboard. The built-in one worked for me.
On a Windows 7 laptop running Windows 7 Pro 64-bit, I created a Cloudready installation USB flash drive.
Now I am ready to install the custom UEFI firmware.
A. Boot into ChromeOS
C. type shell and press Enter key
cd; curl -LO https://mrchromebox.tech/firmware-util.sh && sudo bash firmware-util.sh and press Enter key
Re-boot to boot from the CloudReady USB flash drive.
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