I didn't feel like boring you with a complete disassembly tutorial. Most likely, if you are searching for this, you should already know what you are doing... As so I would think. The photo above illustrates where the write protect screw is located on a HP Chromebox G1, also known as ZAKO. Remove the screw and then you can flash custom firmware. Trust me, it is a must do if you are installing your own OS on this box. Since the life cycle for updates is over, right?