I found that before the computer workstation join Domain, the start up time of Windows 7 is fast, the desktop can be displayed quick. However; once it is joined to Domian, it is slow to display Desktop after user enter user name and password, looks like the authentication process or something loading or synchronizing slow.
Can someone tell me what should I check? I am thinking if the Global Policy caused the problem?
I am using Windows Server 2008 DC