Vista slow after SP2 installed?
Network connectivity may fail when you try to use Windows Vista behind a firewall device:
http://support.microsoft.com/?kbid=934430
Read that and some are reporting after the install of Win2k3 SP2 that their vista clients are slow...
Try the following as discussed in this thread: http://groups.google.com/group/microsoft.public.windows.server.sbs/browse_thread/thread/2b524ff9b4fcfcac/df47b19530cb6819?lnk=st&q=&rnum=1#df47b19530cb6819
netsh interface tcp set global rss=disabled
netsh interface tcp set global autotuninglevel=disabled
and reboot