Vista - Network browsing is very slow

Hi,

I just installed Vista Business in a domain with approx 500 Clients. If I
click on network and want to browse through our domain (nework neighbourhood)
it is very slow to detect all clients. If I open the network, the list is
empty and Vista begins to browse and create the network list. In XP I had an
icon whole Network and I had the view with my domains and workgroups. Is this
view in Vista also possible?
Has anyone an idea how I can see all my clients in the domain, just with one
click and not waiting one minute?
DNS and WINS are installed and all other xp clients have no problems.

Thany you
Dirk