Problem Update Bios

[roccaforte77]

Hi to all

I have problem
My computer is acer extensa E264
My screen mainbord bios boot America megatrends.

Start pc -------

Error: CMOS Checksum Bad
F1
F2

I want update bios

Questions:
where downlod bios?
old bios is V02.61 .

can i save old bios after the update?
thanks reply me

[roccaforte77]

this is my mainboard

Hi to all

I have problem
My computer is acer extensa E264
My screen mainbord bios boot America megatrends.

Start pc -------

Error: CMOS Checksum Bad
F1
F2

I want update bios

Questions:
where downlod bios?
old bios is V02.61 .

can i save old bios after the update?
thanks reply me