OK. I've done some research on web and I found something like this Catch Tito...: How to update to 2.x bios from 1.x bios (applicable for Acer\eMachines\Gateway\Packard Bell). There is solution how to upgrade bios from 1.x to 2.x the problem was Bios Compare Error. In my case I have similar issuses. When I try to downgrade BIOS from 2.14 to other below it I have BIOS Compare Error. I extract installation bios file (the original one from acers website) and modify platform.ini. But when I want to start InsydeFlash.exe it overwrites platform.ini and display same error. Anybody could help me with that. I don't want to have modify BIOS with all features I need original acer BIOS but with ONE OPTION. Disable Nvidia graphic card.