On the keyboard, the default function of the F series buttons is Rename and refresh, and FN + F2 and F5 are other auxiliary functions. However, for this Lenovo keyboard, F1 is a silent keyboard by default, F2 is a volume reduction by default, F3 volume plus, F5 standby, and you need to work with FN to implement functions such as renaming and refreshing, in turn, how can I return to the normal state?
There are three solutions:
1. Change the keyboard. This solution is the best, because Lenovo's keyboard is of poor quality.
2. Set BIOS. Different devices seem to be different. In startup/option keys display style, set it to legacy.
3. Install the Lenovo keyboard driver and a program named Lenovo low profile USB keyboard in the menu. Run the program and modify it as prompted. However, the effect may be the opposite. Try multiple times.
Lenovo is a good thing to do.