Delete ALL network items and re-install
Sometimes, an error does not make sense anymore, and NOTHING
Believe it or not: sometimes the Windows95 network configuration
can become corrupted (don't ask me how and I have no idea, on how
to determine, whether it is a corruption or not).
Usually, there is no need to re-install the complete Windows, it
is often sufficient to delete ALL Network items and then to
re-install the Network..
There is no guarantee, that
this procedure will fix your problem, but it solved the problem
in some cases, where nothing else made sense anymore.