Thanks Ken.

Looks like a great community to be a part of.
As you suggested, I re-installed the lastest
driver. The Action Center just told me, as I was downloading the driver, that there was a known issue with the Ethernet controller. Hopefully this will work. I'll try doing some network-intensive work in the meantime to see how it holds up.
John
EDIT: So far, there hasn't been another blue-screen. I guess we can classify this problem as solved. I can't believe I overlooked the simple solution. Thanks again, Ken!