>We have a fairly large network application written in VFP that is deployed at multiple customer sites. Very few of our customers are running Vista. One customer complained of poor network performance since switching to Vista. Response times in our application more than doubled that in WinXP. I loaded Vista as a dual boot and did some speed tests of my own to rule out any network issues at their site. Sure enough, Vista was more than twice as slow as WinXP in our app. I did a google search and found plenty of settings that can be tweaked to try and improve network performance. One quick hit was to turn off the Offline Files feature. That cut the speeds to about 50 percent slower than XP and our customer was pleased with that result. Has anyone else experienced this behavior and found a way to make Vista run with network shared data as efficiently as XP does? BTW, antivirus and firewalls were shut off during these tests. Also, we copied this clients data to their local hard drive and pointed our application to it and the app was very quick.

If they have a Server 2008 server and Vista clients, they may be communicating via SMB2 rather than SMB. I don't know if this affects speed but it may be worth testing with it turned off to see if that makes a difference: http://www.petri.co.il/how-to-disable-smb-2-on-windows-vista-or-server-2008.htm