解决方案
暂停会话的所有任务，该会话已与Window Station断开连接，
反之亦然，当会话重新连接(用户快速切换)时，将继续执行此任务.
是我在
中提到的 http://social.technet.microsoft.com/论坛/en-US/itprovistasetup/thread/e1a01863-7aae-415c-b3db-35d2c106a27b [

A solution
to suspend all tasks for a session, which is disconnected from window station,
and vice versa resume this tasks when a sessions is reconnected (fast user switching)
is mentioned by me in
http://social.technet.microsoft.com/Forums/en-US/itprovistasetup/thread/e1a01863-7aae-415c-b3db-35d2c106a27b[^]

Erhy