Well, I broke down and called the DSL support today.

Went all the way to the Philippines!
Couldn't understand 1/2 of the woman's speech (and I am good with
Philippino) who said if the 2nd light is out on my DSL modem, than
indicates a computer internal problem. 20mins on hold to the computer
advisor...I learn that I have to pay $99.00 to have support over the phone
for one day advice. And it is $139.00 for 6mos. Imagine!

So now we either live with it, or I look for this .dll error again.
Maybe it came in an update. That is all we can do for now!

Major mondo bummer. Will have to decide what to do in the near future.
Perhaps Comcast.

I did the self help tool, and it suggests increasing the cache size so I did
from the default of 50 to 100MB. But the thing has gone down twice
today so far, and my husband is not even connected. This laptop still
works and so it appears to be my unit having the problem.