I installed Windows 8.1 and ran:
C:\>\Winx64\BOOTUTILW64E.EXE -ALL -FD
Intel(R) Ethernet Flash Firmware Utility
BootUtil version 126.96.36.199
Copyright (C) 2003-2015 Intel Corporation
Disabling boot ROM on port 1...Success
Disabling boot ROM on port 2...Success
Disabling boot ROM on port 3...Success
Disabling boot ROM on port 4...Success
Disabling boot ROM on port 5...
ERROR: Unsupported feature
Port Network Address Location Series WOL Flash Firmware Version
==== =============== ======== ======= === ============================= =======
1 90E2BA8DE948 2:00.0 Gigabit YES FLASH Disabled
2 90E2BA8DE949 2:00.1 Gigabit N/A FLASH Disabled
3 90E2BA8DE94A 2:00.2 Gigabit N/A FLASH Disabled
4 90E2BA8DE94B 2:00.3 Gigabit N/A FLASH Disabled
5 408D5C60E8F6 5:00.0 Gigabit YES FLASH Not Present
BIOS version P11
PCI-E Slot Configuration
Launch PXE OpROM policy UEFI only
IPv4 PXE Support Disabled
IPv6 PXE Support Disabled
Are the above BIOS settings OK?
How can I turn off "Chasis was opened" message?
The bootrom has been disabled. You can also try bootutil utility to disable the boot.
1) You can copy the bootutil.exe into a bootable USB drive, then boot from the USB drive.
2) Enter into DOS mode. Please refer to the extacted list of command here:
Disables FCoE, iSCSI and PXE functionalities for legacy BIOS.
You may refer to this website for more information about the bootutil command Upgrade, Enable, or Disable Flash with the Intel® Ethernet Flash...
With regars to chassis was opened message, please check with Acer the system vendor.