[REQUEST] Acer Aspire E1-571G Bios Unlock

Hello,
[Sorry for my bad English ]
This is my first post , I buy my pc 5 months ago from a friend at first he works perfectly nothing is bad i faced some bluescreen i try to update the bios may that fixed i upadate it from 2.14 to 2.21 after the update he not detect the other nvidia card (Nvidia 710M) {i have two cards Intel and Nvidia} my video ram decresed to 64mb and to 32mb i try to downgrade it but nothing im unable to downgrade it here is i try many and many methods and bios's versions

Acer aspire E1-571G
version bios Insyde Corp 2.21
bios 2.21

 here is my pc information


This is the nvidia card old image before 




Please guys can you unlock this bios for advanced options or help me to downgrade it i try usb with fd file method but nothing or you can unlock the video advanced option to switch graphic card priority please i need this guys i hope you help me and thanks