PeteI'll check out TCP/IP settings next time I'm infront of a Win2K box. Probably not until Tuesday and it's all been NT4.0 recently so I may be getting confused between my OS's (not too difficult these days <g>).
However, meantimes, I've found a knowledge base article that appears to match your symptoms exactly, Q245800.
SYMPTOMS
When you attempt to view the computer share list on a Microsoft Windows 98-based computer from a Windows 2000-based computer, you may experience a delay of up to 30 seconds. This delay occurs only when you are browsing directly to the computer name. If you browse to a share name (for example, \\computer name\share name), there is no delay. This problem occurs when you attempt to view the shares by using either of the following methods:
Click Start, click Run, type \\computer name, and then click OK.
Right-click My Network Places on the desktop, click Search for Computers, type the computer name, and then click Search Now.
CAUSE
This problem can occur when your Windows 2000-based computer is checking to determine if scheduled tasks are enabled on the Windows 98-based computer.
STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article.
Now quite why Windows 2000 should have to check if the Windows 98 box has scheduled tasks enabled or why it takes so long to do it is a mystery to me. But it looks like the work around is to avoid using the browser and go directly to the desired share from Start - Run.
Hope this helps
Andrew Luck
18 SW EGSH