Driver problems (kernel 2.6.11ac7)

[Russell Webster <russ@hexstream.co.uk>]

Hi,
I'm running a Knoppix-hdinstall which until last week has been working 
fine for a good few months.
Last week, out of the blue, I started it up, and my onboard network 
adapter is no longer being seen at all. My USB devices are working 
sketchily, if at all. I have a USB mouse that won't be seen on any of 
the 6 ports, and a USB keyboard that works some of the time, but for 
some reason the num/scroll/caps-lock buttons aren't updating (when they 
are on the PS/2 keyboard).
I'm running an MSI K7N2 Delta-L motherboard (nForce2 chipset).
Sorry to be so vague about this but I honestly have no idea where to 
start. Any help at all would be appreciated.

Thanks,
Russ.