I would like a manual to show the various functions of a computer keyboard

As there is no software for this keyboard, how could there be separate functions for the Fn keys?
The F keys are whatever your hardware (computer) says they are. http://support.logitech.com/product/keyboard-k120#download

Anytime a device, (keyboard, mouse, USB device) stops working, the very first point of issue is to re-install the drivers. Drivers have been known to inexplicably become corrupt and will malfunction or not function at all. In case such as yours, where the device is built into the hardware itself, it's best to go to Start>Computer, right click Computer, click on Properties, then click on Device Manager. Find the device that is malfunctioning, in your case, the mousepad, and right click on it...then click uninstall. Reboot your system and it will reload the drivers on restart. Nine times out of ten, this will resolve the problem. There is a slim possibility that your mouspad plug has become loose...if that's the case, you will have to remove the keyboard and reseat the plug. Youtube has tons of videos showing how to do this with various laptops.

u can download it as a pdf from the official acer website or google search it

The Fn keys have various function depending upon which program is running.
This WEB site may provide the answers you are looking for.
http://www.computerhope.com/issues/ch000306.htm

It can have any number of functions depending on the program that you're using. It can also be mapped to various laptop functions (designated by a smaller symbol near the F2, accessed by holding the Fn button and pressing the F2 button).

Hello,

The 'Enter' and 'Backspace' are two of the most essential keys on a keyboard. It is highly unlikely that they would fail due to a software or driver problem.

It really sounds like the keyboard is actually defective.

I suggest you try plugging it in to another computer. If the same keys are failing the keyboard is defective.

Hope this helps.

according to a website i just visited the instruction manual is on the drivers disk if it is not please reply again see if i can sort the buttons out for you hope this helps regards Jim

This link provides you with a table giving you all the various keyboard functions in windows

zHotkey is a program file which is hardware related. As many spyware programs use similiar names and just locate them elsewhere on your hard drive. Always check the proper disk location of your programs if you are suspicious. This program is known as the chicony keyboard and hardware program, and it controls various keyboard functionalities. This program is considered safe and is not spyware or adware.

hi friend

Keep pressing F2 or del soon as you start up your PC u have to go in cmos setup by perssing f2 or del key when windows stat then press it there was option in go in boot there is boot device pryority set there cd dvd rom by press f10 to save cmos settings & exit then after pc was reboot u will able to boot from cd