Hi all.After rolling up a lot of updates on my server (running on Windows 2003 SP1 R2 x64) my Exchange 2007 SP1 has been crashed & it seems impossible to reanimate it. I wanted to correctly remove Exchange & fully reconfigure my Windows server, but when I try to uninstall Exhcange using setup.exe, I receive only "Microsoft Exchange setup initializing..." message on screen for a few seconds & then - nothing. Message in Event Viewer - "Microsoft Exchange Server -- Setup Completed Successfully".Then I tried to run setup.com /m:uninstall & that's the result:Microsoft Exchange Setup InitializingUnhandled Exception: System.IO.FileNotFoundException: Could not load file or assembly 'System.Management.Automation, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or one of its dependencies. The system cannot find the file specified.File name: 'System.Management.Automation, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' at Microsoft.Exchange.Setup.Common.LauncherBase.MainCore[T](String[] args) at Microsoft.Exchange.Setup.ExSetup.ExSetup.Main(String[] args)WRN: Assembly binding logging is turned OFF.To enable assembly bind failure logging, set the registry value [HKLM\Software\Microsoft\Fusion!EnableLog] (DWORD) to 1.Note: There is some performance penalty associated with assembly bind failure logging.To turn this feature off, remove the registry value [HKLM\Software\Microsoft\Fusion!EnableLog].Exchange Server Setup has encountered an error.And that's all I've got. I have no idea of what it may be. Any solutions?Thanks!P.S. This is my first post to english-speaking Technet comminuty forums, sorry if I've written in wrong thread. WBR, Sergey.

Hi, Did you install Exchange Server on ILM(MIIS) Server? Base on research,System.Management.Automation.dll is part of the Powershell installation, so please try to re-install Powershell on the Exchange Server. Windows PowerShell 1.0 English Language Installation Packages for Windows Server 2003 and for Windows XP http://support.microsoft.com/default.aspx/kb/926139 Besides, I recommend you to check if please ensure that the account which you used to uninstall Exchange Server should has rights listing below: Local Administrator on the server Enterprise Administrator Domain Administrator Schema Administrator (only required for first install to extend the Schema) If it is not the case, then please try to check event log and then post the detail error information here. Also please run ExBPA and then post the ExBPA.log here for further troubleshooting. Regards, Xiu

Xiu,Base on research,System.Management.Automation.dll is part of the Powershell installation, so please try to re-install Powershell on the Exchange Server. I've tried to do so, but also encountered an error:Cannot install this version of product. You must first remove any earlier versions of Windows Power Shell... [and so on].But when I opened Add/Remove Programs, I didn't see any instances of Power Shell presense in my system - there is nothing to unistall. Also, the folder "C:\WINDOWS\system32\windowspowershell\1.0" is empty! I don't know, what happened - may be, there were some errors or bugs during update rollups on 2003 Server.Besides, I recommend you to check if please ensure that the account which you used to uninstall Exchange Server should has rights listing below Yes, I'm running on Domain Administrator account, which is member of Exchange Organisation Administrators in AD.There's no info in Event Viewer neither when I try to start Power Shell Setup nor Exchange Setup.Here is the info from last ExBPA.log file:14:39:59.117: Starting Collecting Data phase.14:40:00.023: Processing Active Directory Schema...14:40:00.085: Processing Active Directory Sites...14:40:00.101: Processing Active Directory Connector Servers...14:40:00.960: Processing Active Directory Domain: GU1...14:40:01.054: Processing Active Directory Connector Connection Agreements...14:40:01.054: Processing Exchange Organization...14:40:01.085: Processing System Policies...14:40:01.085: Processing Recipient Policies...14:40:01.101: Processing Recipient Update Services...14:40:01.757: Error (Invalid namespace ) on WMI search SELECT * FROM Exchange_FolderTree WHERE MapiFolderTree='True' on scope root\MicrosoftExchangeV2 on server CSERVER0, skipping object.14:40:01.804: Processing === Exchange Server: cserver0.gu1.local ===14:40:03.179: Could not load file or assembly 'System.Management.Automation, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or one of its dependencies. The system cannot find the file specified.14:40:03.179: Could not load file or assembly 'System.Management.Automation, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or one of its dependencies. The system cannot find the file specified.14:40:11.585: Error (The server is not operational.) attempting to search for object LDAP://cserver0.gu1.local/--, skipping object.14:40:36.773: Error querying DNS Server 192.168.0.2 for resolving IP address 4.0.168.192.in-addr.arpa. to server name. Error code is This operation returned because the timeout period expired. 14:40:48.773: Error querying DNS Server 192.168.0.3 for resolving IP address 4.0.168.192.in-addr.arpa. to server name. Error code is This operation returned because the timeout period expired. 14:40:50.570: Completed Collecting Data phase.14:40:51.382: Starting Postprocessing Rules phase.14:40:51.648: Completed Postprocessing Rules phase.14:41:08.804: The remote name could not be resolved: 'sqm.microsoft.com'Do I need to perform all tests in ExBPA?It seems to be some trouble with Power Shell - it didn't physically exists in system (nothing in Add/Remove Programs, clear folder in windows/system32), but installer "thinks", that it is... Something remains in registry, maybe? WBR, Sergey.

Hi,Please check kb926139,there we can find steps to check if you have power shell installed and steps to un-install Power Shell.Regards,Xiu