Dear all NEO Z83-4 users, We are releasing the official V1.66 BIOS and MCU firmware upgrade for Z83-4: http://www.minixforum.com/downloads/download.php?file=Z83-4_V1.66_MCU_update.zip Change log since V1.6 BIOS: 1.) Fixed the real time clock (RTC) inaccurate issue; 2.) Fixed the problem that auto power on option doesn't work on some units; Note: You don't have to upgrade to this build if you are not suffering from the above 2 issues, as only a very small percentage of users are experiencing these problems. Upgrade procedures: 1.) Download the zip package from the link above 2.) Extract this package to the root directory (not inside a folder) of a USB thumb drive - FAT32 formatted There should be 6 files in your thumb drive's root directory when it's done. 3.) Plug this USB drive containing the 6 upgrade files to your Z83-4, then powering it up and press "F11" on your keyboard during boot to enter the boot device menu 4.) Select "Built-in UEFI Shell" when you see the below boot device menu and hit "Enter" on your keyboard 4.) Type "fs3:" and then hit "Enter" to read from the USB drive (you may also type "dir" and hit "Enter" after this step to verify all the 6 upgrade files are there, optional) 5.) Type "update.nsh" and hit "Enter" to execute the upgrade package, it shall take a few minutes and upon completion, your Z83-4 will be shut down automatically, you will have to turn it back on manually after this upgrade. 6.) Patiently wait for the upgrade to complete, DO NOT disconnect the power source during the process you may brick your machine! If you have any questions regarding this upgrade, please feel free to let us know. Thanks & regards, Team MINIX.