Acer laptops use the Function keys as device keys by default. So, if you press the F1 it puts the laptop to sleep rather than executing the F1 command. To use the Function key commands, you need to use the Fn key with the F1 key.
If you find the touchpad on your laptop does not work, it is likely that someone has pressed the F7 key which turns the touchpad on and off. Pressing F7 should turn it back on again.
If you find the touchpad still does not work, please let us know via Library Talk live chat so we can report the laptop to be fixed.