Files accessible by other computers yet cannot connect to others.

I have seen a few posts here that somewhat resemble the problem I am trying
to resolve,
yet none of those solutions work.

Several computers are networked together, and are able to access the other
computers,
and also access them via the \\192.168.1.xxx method from Run in Windows 98.
The only
exception is the one computer that cannot access any of the others via
either of these
methods, yet the other computers can access it. Some of my findings:

Client for MS Networks:
Only Logon and restore network connections is checked.

File and Print Sharing:
Browse Master = Automatic (tried setting it to Disabled,
reboot, back to Automatic, same problem).
LM Announce = No

NetBeui:
Both Client for MS Networks and File & Print Sharing are checked.
Max=10, NCBS=12
Default protocol option checked (was unchecked, same problem).

TCP/IP uses DHCP for Wins Resolution
Bindings Client for MS Netowks and File & Print Sharing both checked.


Network Card:
Network Address is not present (problem???),
Receive Buffer=64k, Link Speed/Duplex=Auto negotiate

Now things start getting stranger ...
Network Neighborhood - Only Entire Network is shown.
Double click - Unable to browse the network.
Properties - Properties for this item are not available.

Accessories - System Tools - System Info
System file checker ran with no problems.
MSINFO32.EXE loaded OK, went under Components/Network
and received error Illegal operation, Invalid page fault
at 0177:0040267e.

Thus on the outside everything looks ok, yet when I get into
the nitty gritty, something is just not right, and there are
no friendly messages or troubleshooting hints to explain why.