To be more clear, right now the volume and brightness keys are used and I have to hold fn in order to execute an F1, F2, F3, F4, F5... command. Can I reverse this so it's function key by default and holding fn enables the volume and other special controls?
There are 2 methods to change the Fn behavior.
Try one of the following combination:
Fn + NumLock
Fn + ~ key (it’s the one before a 1 on most US keyboards)
Fn + Esc
Change the Fn behavior from the BIOS menu.
After you open the BIOS menu, go to Function Key Behavior.
Then select Function Key First (if it doesn't work, repeat and select Multimedia Key First).