Ok, so I've seen the links greg sent and I've understood the obvious advantages of UEFI over BIOS. Then, I've run Aida64 and found out that I have a InsydeH20 BIOS version 1.11. The Acer site lists under BIOS downloads version 1.12 and version 2.12 which is labelled "BIOS - UEFI for Windows 8 (Not for Upgrades)". The Windows 7 currently installed was installed through Legacy BIOS, by DVD. I have not made any BIOS updates yet. A dual-boot with W8 without UEFI is an option, but since the motherboard is UEFI capable, I would like to use its advantages. So, what you suggest?
Another thing: the Acer site says that it is not recommended to switch to UEFI on laptops with Windows 7 preinstalled and it is not recommended to switch to BIOS on laptops with W8 preinstalled. The problem is that mine came with Linux preinstalled, while the Acer site's driver section lists drivers for both Windows 7 and W8. Then, on the internet I've seen that BIOS upgrades are from the "if it works, don't update it" category. What can possibly go wrong? Shouldn't it be a worry-free upgrade since it is only an .exe to run?