Hey guys hoping you can help me out here I too have an Acer Aspire E1-531. I've done a clean install of Windows 8 64bit. I'm running the BIOS version 1.13 . I want to upgrade to the new UEFI 2.04 but am unsuccessful so far. I get an error saying please update to the same type of BIOS (v 1.x) .Any solutions?