Using the web platform installer and manual downloads, SQL install fails with the following error. I posted this here rather than in the sql forum because I have tried reinstalling .net framework on my windows 7 64-bit machine under Turn windows features on or off and haven't had any luck repairing the framework. Exception type: System.IO.FileNotFoundException Message: Could not load file or assembly 'System.DirectoryServices, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or one of its dependencies. The system cannot find the file specified. Data: DisableWatson = true Stack: at Microsoft.SqlServer.Configuration.Sco.User..ctor(ServiceContainer ctx, String userName) at Microsoft.SqlServer.Configuration.SqlEngine.InputValidator.ValidateServiceAccount(String sqlAccount, SqlSecureString sqlPassword, String sqlDomainGroup, ConfigActionScenario scenario, Boolean isExpressSku) at Microsoft.SqlServer.Configuration.SqlEngine.InputValidator.ValidateServiceAccountForInstall() at Microsoft.SqlServer.Configuration.SqlEngine.InputValidator.ValidateInstallInput() at Microsoft.SqlServer.Configuration.SqlEngine.SqlEngineSetupPublic.ValidateSettings() at Microsoft.SqlServer.Configuration.SetupExtension.ValidateFeatureSettingsAction.ExecuteAction(String actionId) at Microsoft.SqlServer.Chainer.Infrastructure.Action.Execute(String actionId, TextWriter errorStream) at Microsoft.SqlServer.Setup.Chainer.Workflow.ActionInvocation.ExecuteActionHelper(TextWriter statusStream, ISequencedAction actionToRun)

Exception type: System.IO.FileNotFoundException Message: Could not load file or assembly 'System.DirectoryServices, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or one of its dependencies. The system cannot find the file specified. ctionInvocation.ExecuteActionHelper(TextWriter statusStream, ISequencedAction actionToRun) This message means that the DLL: "C:\Windows\Microsoft.NET\Framework\v2.0.50727\System.DirectoryServices.dll" is not found. This file is a Windows DLL which belongs to .net Framework 2.0. Maybe the DLL is damaged or completely missing. Please start the command prompt (cmd.exe) with admin right s [1] and run sfc [2]: sfc.exe /scannow Is it able to find and repair broken files?Does the setup work now? If not, extract the DLL from your DVD [3] and store the DLL into the folder C:\Windows\Microsoft.NET\Framework\v2.0.50727\. If this doesn't work, extract the 64Bit version of the DLL from the DVD to this folder: C:\Windows\Microsoft.NET\Framework64\v2.0.50727\. best regards André [1] http://windows.microsoft.com/en-US/windows7/How-do-I-run-an-application-once-with-a-full-administrator-access-token [2] http://support.microsoft.com/kb/929833 [3] http://blog.nirsoft.net/2009/09/17/how-to-extract-missing-system-files-from-the-dvd-of-windows-7vista/"A programmer is just a tool which converts caffeine into code" CLIP- Stellvertreter http://www.winvistaside.de/

I copied the System.DirectoryServices.dll from a known working Windows 7 64-bit computer from both the 32 and 64 bit directories with no luck. sfc /scannow at an elevated command prompt fails "Windows Resource Protection found corrupt files but was unable to fix some of them. Details are included in the CBS.log windir\Logs\CBS\CBS.log"

I have a attached part of the CBS.log file which may be of interest but I have copied all of the valid files from a working Windows 7 64bit machine. Please keep in mind that I do not have a windows 7 dvd because this computer was bought directly from the store and it didn't come with it, nor have I been able to find an i386 directory anywhere on the disk. 2010-12-28 20:13:21, Info CSI 000001c6 [SR] Verify complete 2010-12-28 20:13:22, Info CSI 000001c7 [SR] Verifying 100 (0x0000000000000064) components 2010-12-28 20:13:22, Info CSI 000001c8 [SR] Beginning Verify and Repair transaction 2010-12-28 20:13:25, Info CSI 000001c9 [SR] Cannot repair member file [l:34{17}]"System.Design.dll" of System.Design, Version = 6.1.7600.16385, pA = PROCESSOR_ARCHITECTURE_MSIL (8), Culture neutral, VersionScope neutral, PublicKeyToken = {l:8 b:b03f5f7f11d50a3a}, Type neutral, TypeName neutral, PublicKey neutral in the store, file is missing 2010-12-28 20:13:25, Info CSI 000001ca [SR] Cannot repair member file [l:34{17}]"System.Design.dll" of System.Design, Version = 6.1.7600.16385, pA = PROCESSOR_ARCHITECTURE_MSIL (8), Culture neutral, VersionScope neutral, PublicKeyToken = {l:8 b:b03f5f7f11d50a3a}, Type neutral, TypeName neutral, PublicKey neutral in the store, file is missing 2010-12-28 20:13:25, Info CSI 000001cb [SR] This component was referenced by [l:202{101}]"Microsoft-Windows-Foundation-Package~31bf3856ad364e35~amd64~~6.1.7600.16385.WindowsFoundationDelivery" 2010-12-28 20:13:25, Info CSI 000001cc Repair results created: POQ 77 starts: POQ 77 ends. 2010-12-28 20:13:25, Info CSI 000001cd [SR] Verify complete 2010-12-28 20:13:25, Info CSI 000001ce [SR] Verifying 100 (0x0000000000000064) components 2010-12-28 20:13:25, Info CSI 000001cf [SR] Beginning Verify and Repair transaction 2010-12-28 20:13:25, Info CSI 000001d0 [SR] Cannot repair member file [l:56{28}]"System.DirectoryServices.dll" of System.DirectoryServices, Version = 6.1.7600.16385, pA = PROCESSOR_ARCHITECTURE_MSIL (8), Culture neutral, VersionScope neutral, PublicKeyToken = {l:8 b:b03f5f7f11d50a3a}, Type neutral, TypeName neutral, PublicKey neutral in the store, file is missing 2010-12-28 20:13:30, Info CSI 000001d1 [SR] Cannot repair member file [l:56{28}]"System.DirectoryServices.dll" of System.DirectoryServices, Version = 6.1.7600.16385, pA = PROCESSOR_ARCHITECTURE_MSIL (8), Culture neutral, VersionScope neutral, PublicKeyToken = {l:8 b:b03f5f7f11d50a3a}, Type neutral, TypeName neutral, PublicKey neutral in the store, file is missing 2010-12-28 20:13:30, Info CSI 000001d2 [SR] This component was referenced by [l:202{101}]"Microsoft-Windows-Foundation-Package~31bf3856ad364e35~amd64~~6.1.7600.16385.WindowsFoundationDelivery" 2010-12-28 20:13:31, Info CSI 000001d3 Repair results created: POQ 78 starts: POQ 78 ends. 2010-12-28 20:13:31, Info CSI 000001d4 [SR] Verify complete 2010-12-28 20:13:31, Info CSI 000001d5 [SR] Verifying 100 (0x0000000000000064) components 2010-12-28 20:13:31, Info CSI 000001d6 [SR] Beginning Verify and Repair transaction 2010-12-28 20:13:45, Info CSI 000001d7 Ignoring duplicate ownership for directory [l:126{63}]"\??\C:\ProgramData\Microsoft\Windows NT\MSFax\Common Coverpages" in component Microsoft-Windows-Fax-Common, Version = 6.1.7600.16385, pA = PROCESSOR_ARCHITECTURE_IA32_ON_WIN64 (10), Culture neutral, VersionScope = 1 nonSxS, PublicKeyToken = {l:8 b:31bf3856ad364e35}, Type neutral, TypeName neutral, PublicKey neutral

The file System.Design.dll is also missing. Run an InPlace Upgrade [1][2] to repair your windows. Your programs are still usable after doing the InPlace upgrade. This should repair all missing files. Now try to install the SQL Server 2008 R2 again. André [1] http://support.microsoft.com/kb/2255099 [2] http://www.sevenforums.com/tutorials/3413-repair-install.html"A programmer is just a tool which converts caffeine into code" CLIP- Stellvertreter http://www.winvistaside.de/

Is it possible to do an in place upgrade using a service pack or something? Maybe if I download Windows 7 SP1 RC1? I don't have a windows 7 DVD