Hi PAULAMASTRIANNA
The actions on your function keys (F1 - F12) is controlled by a utility installed by the manufacturer of your PC, try pressing the Fn key + F2, does that produce the required action?
If so, what is the Make and exact Model No. of your PC - that will be printed on a sticker on the bottom casing and I will check of there is a way to turn off the Fn key requirement . . .
Sometines, that can be turned off by pressing Fn + Esc or if there is a Fn Lock key . . .