I am using Windows 7 Beta version from last month. Things work fine here. Recently on my tour when I clicked on Switch user the entire system freezes. Nothing happens here and then there is only solution is to forcibly shut down the computer and restart it back again. The system only get affected when I click the particular option. I had created some extra accounts in order to allow my colleague to surf net but blocking the personal files. Here no account is working under fast switching mode. Is my Windows corrupted. Help needed. Thanks in advance.