You can set which computer is the master Browser with the registry punch HKEY_LOCAL_MACHINE\ SYSTEM\CurrentControlSet\ Services\Browser\Parameters Registry key to YES.
Setting this registry key to NO will stop that Toshiba from being a master browser and registering the error.
The potential states for a browser are:
Domain Master Browser. Used only in domain environments. By default, the primary domain controller (PDC) for a domain operates in this role. The domain master browser collects and maintains the master browse list of available servers for its domain, in addition to any names for other domains and workgroups used in the network. It also distributes and synchronizes the master browse list for master browsers on other subnets that have computers belonging to the same domain.
Master Browser. Collects and maintains the list of available network servers in its subnet. The master browser fully replicates its listed information with the domain master browser to obtain a complete browse list for the network, and distributes it to backup browsers located on the same subnet.
Backup Browser. The backup browser receives a copy of the browse list from the master browser for its subnet, and distributes it to other computers upon request.
Potential Browser. Capable of becoming a backup browser when instructed to by the subnet's master browser, the potential browser operates similarly to a non-browser under normal conditions.
Nonbrowser. A nonbrowser is configured so it cannot become a browser, and it does not maintain a browse list. It can operate as a browse client, requesting browse lists from other computers operating as browsers on the same subnet. When the Computer Browser service is turned off there is no mechanism to discover other computers to populate the My Network Places, and so on.
