Hi all - I'm a moderately technical guy (but not a real network admin type) who's found himself running a small office network (<10 machines), and normally, everything works fine running just a workgroup set-up. However, one XPsp2 machine was moved to a new location (no other set-up changes), and since then, has been refusing to participate in the workgroup. It looks like that machine has tried to become the Workgroup Master Browser, kicking out the machine that normally does that job via a forced election, and then won't do anything else. I've replaced it as the Master Browser, and changed the RegKey for 'Maintain Server List' from 'Auto' to 'No', and everything else is working fine, but it still won't participate in the Workgroup. It's logging into e-mail on the mail server just fine, accessing the internet no problems, and it shows up on the Workgroup Master Browser's list of attached clients, but does not appear in 'show workgroup computers' on other machines, and will not display other workgroup machines on its own 'show workgroup computers'. Any ideas how to address this? I've already uninstalled and re-installed the Windows Network Client, variously restarted, turned on and off the Windows firewall, and otherwise futzed with the network connection, but now I'm thinking that somewhere in the registry, a setting for SMB participation has been messed up - perhaps there's a 'particpate in workgroups like a normal computer - Auto' setting or some such. Any help appreciated?