Hello, I am running Samba 4.0.1 as AD DC. I have configured GPOs for redirecting folders (Application Data, Documents etc.). Yesterday, there was a strange problem. The network switch suddenly went kaput and all machines lost connection to the DC. Users logged off and when they are trying to start machine today, Windows 7 can not start. Few of the machines had restore points for day before yesterday and they could be restored. All others are in the need of re-installation. Has anyone faced such kind of problem earlier? Could it be related to redirecting the AppData(Roaming) folder? Let me know if more information is required. Thanks & regards, Nishant