Hello Sylvia, thanks for the reply.
I already go into my BIOS, but I can't find my Intel Turbo Boost Technology. It only shows some basic options only, no advanced options. At the very top of the screen, I think it shows the BIOS name, "Phoenix SecureCore Tiano Setup".
I will try to ask help in Acer community too. Hope I can get an answer for my problem.
Thanks for trying to help me, Sylvia.