UEFI, Computer's Security & Speed.

For the Security & Speed of Your Computer (Not only Windows PC), i suggest enabling the UEFI Functionality.

It works well with Antivirus Software, makes it harder for viruses & other malware to bypass Antivirus Software.
(thanks to UEFI, Antivirus is executed before malicious software has a chance to start ... and in Computer Sciences, program that starts earlier controls the situation).

(i am a computer nerd - i've worked in Computer Sciences professionally for about 5 years, studied a bit of Computer Sciences in Warsaw University too).

... yes, there are many ideas for tweaking computers, but i think UEFI is one of the most important functionalities to enable.


How to do it?

... well, it depends on computer, motherboard (and BIOS) and operating system You are using.
... i suggest searching the internet using Google or other search tool (as Microsoft Bing for example), considering your motherboard/bios and operating system in the search query.

For a more, click:
> [ Unified Extensible Firmware Interface on Wikipedia ].