#4: NetBIOS conflicts
NetBIOS, still in use on many Windows NT 4.0 networks in particular, contains many built-in processes to catch and manage conflicts. Occasionally, however, those processes don't handle conflicts properly. The result can be inaccessible file shares, increased network congestion, and even outages.
Guard against NetBIOS conflicts by ensuring older Windows systems all receive the most recent service packs. In some cases, Windows NT 4.0 systems having different service packs will generate telltale NetBT (ID 4320) errors.
Strange network behavior can also occur when two systems are given the same computer name or when two systems both believe they serve the master browser role. Sometimes the error will log itself as Event ID 8003 in a server's system log. Disabling WINS/NetBT name resolution (only if it's not required) can eliminate such issues.
If disabling NetBT is not an option, such errors can often be eliminated by identifying the second system that has the same computer name within the same domain and giving it a new name or by restarting the Netlogon Service on the domain controller. Yet another option for eliminating legacy NetBT issues is to search a system's LMHOSTS file for inaccurate or outdated entries. Some IT professionals claim they've solved similar errors by disabling and re-enabling the NIC on the offending system.
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