I tried to install The Sql Server express 2008, it got through all the pre-reqs but I found I already had a default SQL Server when it went to install the Sql 2008.. Since I wanted 2008 as default, I canceled and went and deleted the SQL install from the add remove.

Then I returned to install, it moved through all the prereq's quickly and then spent a long time downloading SQL Express, but in the end it errored with "the downloaded file appears to be corrupt.

I looked for something to delete in add remove, but it doesn't seem to be in register, I have restarted computer.. But I always come back to file appears to be corrupt. It does not seem to try to download a new version of SQL Express now, it just seems to think it needs to install it, but can't because it's corrupt, any way that I can get it to re-download a hopefully good copy of SQL Express?

Would removing the Microsoft Sql Server 2008 setup & support files help? It may be what is indicating that the file is downloaded already. But I fear if it is not, I may loose a part of the installation I can't get back because something else says it has already been installed, and will not reinstall it again. Something else still installed is Microsoft SQL server Native client.

I found the fix.

Run the disk cleanup on the C: drive.

(If you don't know how, choose my computer, right click on C: dirve, choose properities, choose disk cleanup from there.)

check all boxes but the one for the compress old files.

After that the file would redownload.

(I also think the choce for the Advanced Service setup is the one corrupt, I tried it 2 more times, it downloaded, but each time corrupt (had to redo disk cleanup)... Then I ran the default choice. This worked fine.

I am experiencing a similar problem. Cancelling the install and trying again does not fix it.

I found the fix.

Run the disk cleanup on the C: drive.

(If you don't know how, choose my computer, right click on C: dirve, choose properities, choose disk cleanup from there.)

check all boxes but the one for the compress old files.

After that the file would redownload.

(I also think the choce for the Advanced Service setup is the one corrupt, I tried it 2 more times, it downloaded, but each time corrupt (had to redo disk cleanup)... Then I ran the default choice. This worked fine.

Well this problem seem to occur. Log files reports "Failed to parse certificate... "

Part of my log file is as displayed:

Info: [T3][ 9:44:44.694] ComponentInstaller.Install Preparing to install SQL Server 2008 Express with Advanced Services.
Verbose: [T3][ 9:44:44.694] ComponentInstaller.ValidateFile Start
Info: [T3][ 9:44:44.694] ComponentInstaller.ValidateFile Validating SQLEXPRADV_x86_ENU.exe.
Verbose: [T3][ 9:44:44.694] ComponentInstaller.GetFileCertificate Start - file=D:\Documents and Settings\All Users\Application Data\Microsoft\SQL Server 2008 Express Install\Downloads\SqlExpressWithAdv\SQLEXPRADV_x86_ENU.exe
Warning: [T3][ 9:45:28.357] ComponentInstaller.GetFileCertificate Failed to parse certificate in SQLEXPRADV_x86_ENU.exe: System.Security.Cryptography.CryptographicException: Cannot find the requested object.
at System.Security.Cryptography.CryptographicException.ThrowCryptogaphicException(Int32 hr)
at System.Security.Cryptography.X509Certificates.X509Utils._QueryCertFileType(String fileName)
at System.Security.Cryptography.X509Certificates.X509Certificate.LoadCertificateFromFile(String fileName, Object password, X509KeyStorageFlags keyStorageFlags)
at System.Security.Cryptography.X509Certificates.X509Certificate..ctor(String fileName)
at Microsoft.SqlServer.SqlExpressWrapper.Controller.ComponentInstaller.GetFileCertificate(String file)
Verbose: [T3][ 9:45:28.692] ComponentInstaller.GetFileCertificate End - returned NULL
Warning: [T3][ 9:45:28.692] ComponentInstaller.ValidateFile File validation FAILED (certificate could not be obtained from file).
Verbose: [T3][ 9:45:28.692] ComponentInstaller.ValidateFile End - returned False
Verbose: [T3][ 9:45:28.724] ComponentInstaller.Install End - returned [ExitCode=0, Success=False, Action=RetryDownload, MessageStringId=]
Error: [T3][ 9:45:29. 59] InstallController.InstallComponents Error: Microsoft.SqlServer.SqlExpressWrapper.Controller.InstallException was thrown: The downloaded file appears to be corrupt.
Source: SqlExpressWrapper
Stack: at Microsoft.SqlServer.SqlExpressWrapper.Controller.ComponentInstaller.Install()
at Microsoft.SqlServer.SqlExpressWrapper.Controller.InstallController.InstallComponents()

Yes I have a similar problem while installing SqlServer 2008 with Advanced Tools this is wha my error log file says:

Verbose: [T3][22:41:23.500] ComponentInstaller.ValidateFile Start
Info: [T3][22:41:23.500] ComponentInstaller.ValidateFile Validating SQLEXPRADV_x86_ENU.exe.
Verbose: [T3][22:41:23.640] ComponentInstaller.GetFileCertificate Start - file=C:\WINNT\Profiles\All Users\Application Data\Microsoft\SQL Server 2008 Express Install\Downloads\SqlExpressWithAdv\SQLEXPRADV_x86_ENU.exe
Warning: [T3][22:42:14.750] ComponentInstaller.GetFileCertificate Failed to parse certificate in SQLEXPRADV_x86_ENU.exe: System.Security.Cryptography.CryptographicException: Cannot find the requested object.

at System.Security.Cryptography.CryptographicException.ThrowCryptogaphicException(Int32 hr)
at System.Security.Cryptography.X509Certificates.X509Utils._QueryCertFileType(String fileName)
at System.Security.Cryptography.X509Certificates.X509Certificate.LoadCertificateFromFile(String fileName, Object password, X509KeyStorageFlags keyStorageFlags)
at System.Security.Cryptography.X509Certificates.X509Certificate..ctor(String fileName)
at Microsoft.SqlServer.SqlExpressWrapper.Controller.ComponentInstaller.GetFileCertificate(String file)
Verbose: [T3][22:42:15.187] ComponentInstaller.GetFileCertificate End - returned NULL
Warning: [T3][22:42:15.187] ComponentInstaller.ValidateFile File validation FAILED (certificate could not be obtained from file).
Verbose: [T3][22:42:15.187] ComponentInstaller.ValidateFile End - returned False
Verbose: [T3][22:42:15.296] ComponentInstaller.Install End - returned [ExitCode=0, Success=False, Action=RetryDownload, MessageStringId=]
Error: [T3][22:42:15.796] InstallController.InstallComponents Error: Microsoft.SqlServer.SqlExpressWrapper.Controller.InstallException was thrown: The downloaded file appears to be corrupt.
Source: SqlExpressWrapper
Stack: at Microsoft.SqlServer.SqlExpressWrapper.Controller.ComponentInstaller.Install()
at Microsoft.SqlServer.SqlExpressWrapper.Controller.InstallController.InstallComponents()

INNER EXCEPTION:
<NONE>
Verbose: [T3][22:42:15.812] Wizard.controller_Error Start - sender=Microsoft.SqlServer.SqlExpressWrapper.Controller.InstallController; e=Microsoft.SqlServer.SqlExpressWrapper.Controller.ErrorEventArgs
Verbose: [T1][22:42:15.812] Wizard.controller_Error Start - sender=Microsoft.SqlServer.SqlExpressWrapper.Controller.InstallController; e=Microsoft.SqlServer.SqlExpressWrapper.Controller.ErrorEventArgs
Verbose: [T1][22:42:15.906] ErrorDialog.Window_Loaded Start - sender=Microsoft.SqlServer.SqlExpressWrapper.UI.ErrorDialog; e=System.Windows.RoutedEventArgs
Verbose: [T1][22:42:15.906] ErrorDialog.Window_Loaded End
Verbose: [T1][22:42:23.562] InstallController.ViewLogCommand_ExecutedStart - sender=Microsoft.SqlServer.SqlExpressWrapper.UI.ErrorDialog; e=System.Windows.Input.ExecutedRoutedEventArgs
Verbose: [T1][22:42:23.687] InstallController.ViewLogCommand_ExecutedEnd


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I'm going to now try to clean up my disk and re-install

The download with Advanced Features is still failing (2 months later!). The download with Tools (the default) installs fine.

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Still the same problem when trying to download SQL Express with advanced features, the install claims the download is corrupt (and the cleanup disk doesn't fix this). I'm using XP SP3.

Problem seems to have being around for 6 months now.

I've got original CD's MS VS 2008 Pro, the same prob still is. Nothing changes. Stopped on CAB files.