Hi. We've been having a nightmare connecting 4 Windows 98 machines together in a simple peer to peer network. The Windows 98 build on all machines is 4.10.1998 - not second edition.Notes:
A) On the computers with the VIA motherboards, we have installed the patch which caused Computer 1 and 3 to talk stably between each other. Computer 5 is still a bust.
B) All computers have this model of NIC:
Network Everywhere Ethernet Adapter (NC100 V2) - from Linksys
C) All computers have File and Printer sharing on, the SAME workgroup name for all computers in ALL CAPITALS, and Share Level Access Control checked in the Access Control tab in the Network properties window.
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In this scenario, we have 4 computers:
Computer 1
Computer 3 (ignore Computer 2, as that is another problem altogether 
Computer 4
Computer 5
Here are the specs:
Computer 1
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233 MMX with a VIA MB
Primary Network Logon: Windows Logon
Protocols installed:
TCP/IP (IP Address assigned automatically on all) - default protocol
Computer 3
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Some form of MMX Pentium with a VIA MB
Primary Network Logon: Windows Logon
Protocols installed:
TCP/IP (IP Address assigned automatically on all) - default protocol
Computer 4
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166 MMX - Dell build
Primary Network Logon: Windows Logon
Protocols installed:
TCP/IP (IP Address assigned automatically on all) - default protocol
IPX/SPX - with NetBIOS
Computer 5
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233Mhz Pentium with a VIA MB
Primary Network Logon: Windows Logon
Protocols installed:
TCP/IP (IP Address assigned automatically on all) - default protocol
Okay, now for the problem. We have tried the whole system on all 3 protocols: IPX/SPX, NetBEUI and TCP/IP. We have gotten Computers 1 and 3 talking and sharing files. We have also gotten Computers 4 and 5 talking. The problem is combining these 2 seemingly separate networks into one USABLE workgroup.
HUB - NETGEAR 10base-T Ethernet 6 port (EN106tp)
Note: This Network System is being put together for a small Charity Organization who delivers meal to those who have a loss of autonomy - I know that this sounds like a line but really, we are only volunteering here for two weeks more and appreciate all the help we can get at this point.