for those who have no keyboard / mouse etc.... take the big cover of the bottom that covers the memory / cpu etc...
then remove the ram and you will see a jumper named "J2" cross this with a flat screwdriver then turn your machine on. This will reset the bios, Hopefully this will reset the keyboard etc.... However this did not work for me but did reset the bios.
I then inserted a usb pcmcia and was able to use a usb keyboard, I then downloaded the latest bios update and installed it.
yip he machine has worked mint with no problems for over 6 months!!!
This is a bios problem that acer no about but is easilly sorted with an update "if you can use your keyboard!!!"