OHHHHHH... in that case I would very much like to slap whoever decided that the default state of the Fn key should make the F keys do the manufacturer alternative functions.I'm dumb. I got it set up correctly it's just fn + f9 for me instead of f9. Sorry
You should be able to switch that behaviour, though it will required diving into the BIOS/Firmware settings (whichever it is that your computer uses)
If you don't know what you are doing in that regard, get a local professional to help.