Acer aspire 5732z

Hello guy's ,

I'm new to your forum , In fact I joined it today.i wanted to ask you how can you unlock Or upgrade my Acer aspire 5732z Bios. I really want to change the video shared memory but It's not highlighted and I can't access to it . Please help me guys

Information about acer aspire 5732z
CPU TYPE -PENTIUM® DUAL CORE CPU
CPU SPEED - 2.10GHZ
SYSTEM BIOS VERSION - V2.05
VGA BIOS VERSION - INTEL V1800
MANUFACTURER NAME - ACER

PLEASE HELP GUYS I REALLY WANT TO CHANGE THE VIDEO MEMORY