I have the same problem. My pc crash with aswnet.sys and ndis.sys when I install a program with windows 8.
In my laptop, I upgrade windows 7 to windows 8 and any problem but in the Home PC, I was a fresh install and I have many crash.
When I uninstall the Avast, the problem was out.
I donĀ“t have any problem with other programs or drivers.
Fixed soon please.
(Avast Internet security, Intel i7 3.4. Geforce 460gtx, 8gb ram, Sound blaster x-fi titanium sound car)