I have successfully restored the OS using adb devices / adb sideload update.zip and got back to the latest image for Android. However I still get the warning message "Bootloader is unlocked and software integrity cannot be guaranteed..." upon each boot.
As I would like to sell this device my strong preference would not be to have this message anymore displaying even though the device of course functions perfectly fine.
It has been very difficult to Google around XDA forums and especially since people are usually moving away from the factory bootloader my luck finding anything has proven beyond difficult.
Any help would greatly be appreciated! Thank you!