does it happen to be still under warranty? if so contact acer.
I found the support pages for that laptop on the UK area of the Acer site-
http://www.acer.co.uk/acer/service.d...CRC=2980211862
you can download the manual, update drivers and contact Acer there.
acer aspire keyboard not working
http://www.google.com/#hl=en&q=acer+...1c6ebfff7f9103
Acer laptop keyboard not working-
http://www.google.com/#hl=en&source=...ca629f83f82f8a