Hi, here glad to share the firmware of Ainol Mini PC II.

Download here: Ainol Mini PC II Windows 8.1 Firmware & Ainol Mini PC II Android 4.4 Firmware

Prepare:
1、Two USB disk(one for Android disk , another for Windows disk) and one keyboard , one mouse(better use a usb hub to connect) will be used.

2、Making USB disk：
A、For Android disk：
a、After the android disk is plugged , go in this folder(provided by us)

b、find the PartitionWizard.exe and open it，the interface will be showed as follow：

c、click button to delete the android disk.

d、and then the button must be clicked to create a new disk：

（the option drew with red line must be set above,one is Primary,one is FAT32）

e、click “OK”.

f、The final thing is to click “Apply” to apply your setting.

B、Making Windows disk：
The method of making windows disk is the same with that of android disk，the only difference one is that the windows disk ‘s file system is NTFS：
（the option drew with red line must be set above,one is Primary, one is NTFS）

Then rename the windows disk to “WINPE”,like this:

Update OS firmware
1、Copy all files in Android folder to the root directory of the android disk , and windows is the same.

A、Android OS must be installed first ：
a、Plug the android disk into the target board，if the system in the board is dual OS，we must go in the android os for one time：

b、In android OS, click the power button and select “Reboot” to reboot：

c、after reboot , a logo will be showed as follow,
, press “Esc” key in the keyboard to go in BOIS setup interface：

d、in BOIS interface , select the “ Launch EFI from file system device ” option ,press Enter key in the keyboard to install android os：

B、installing windows OS：

a,Plug the windows disk into the target board:

b , in android os，reboot the system：

c、the interface below will be showed，press Left key in the keyboard，select the windows icon，press Enter key to continue：

d、Then we go in the windows install interface，just wait to finish：

update BOIS firmware
PS: please never try updating the bois firmware in a legal windowns 8.1 os , the key in it will be lost , and it is not repairable.
a , After windows installing is finished，go in the windows system，open the windows USB disk:

b , Go in the BOIS folder，and find run.bat file, right click and select“ Run as Administrator ” option, to run run.bat file.

c、after updating BOIS is done, it will reboot automatic.