Intel® Driver & Support Assistant
Larkbox OS for SSD
Hasleo Sofware EFI System Partition Repair Utility
Chuwi LarkBox Drivers.zip (restore w/DrvBK.exe program)
Chuwi After Sales Service
BIOS Reset/Clearing procedure below - courtesy of user SpareADime
The BIOS is fragile, a lot of settings can brick it. Chuwi forums have a lot of bricked Larkboxes but I found no solution. In the end, I gave up waiting for support, opened up the unit, and removed the CMOS battery. Press & hold power for 15s, let it sit over dinner then after putting it back together, BIOS was reset and it booted up for me! The setting that bricked mine was Chipset > South Bridge > OS selection.