Upgrade MSI Primo 81L to Android 6.0.1 Marshmallow
Download latest firmware Android 6.0.1 Marshmallow for tablet MSI Primo 81L
The latest firmware android 6.0.1 marshmallow, starting upgrade from a PC with Windows 10/8.1/8/7/XP (this is a custom firmware for this tablet, you install it as is).
The driver of the USB and software to update the firmware of the tablet (run the .exe file for help on upgrading and starting the update).
Root firmware android 5.1.1 lollipop (rip from original firmware msi primo 81l).
Update firmware for other MSI tablets.