http://msmvps.com/blogs/bgb/archive/2009/03/04/stuck-network-switch-ports-and-workstation-drivers.aspxI got a call that two workstations at check in were off the network. I suggested running Malwarebytes Antimalware. That has fixed a few machines at that account. Note that I just got this account. It has almost 100 devices at two locations, no domainenCommunityServer 2008.5 SP2 (Build: 40407.4157)