Problemer med at instalere SQL Server 2005 Express

Når jeg prøver at instalere SQL Server 2005 Express så kan den ikke instalere det i logen står der dette

Error log


[01/15/06,22:15:41] setup.exe: [2] ISetupComponent::Pre/Post/Install() failed in ISetupManager::InstallManagerHelper() with HRESULT -2147023278.
[01/15/06,22:15:41] setup.exe: [2] Component error string not specified in ISetupManager::AddToActionResultCollection()
[01/15/06,22:16:28] VS70pgui: [2] DepCheck indicates Microsoft Visual Studio 2005 Professional Edition - ENU is not installed.
[01/15/06,22:16:28] VS70pgui: [2] Unknown component status forMicrosoft SQL Server 2005 Express Edition x86
[01/15/06,22:30:26] Microsoft SQL Server 2005 Express Edition x86: [2] Component Microsoft SQL Server 2005 Express Edition x86 returned an unexpected value.
[01/15/06,22:30:35] VS70pgui: [2] DepCheck indicates Microsoft SQL Server 2005 Express Edition x86 is not installed.
[01/20/06,18:47:57] Microsoft SQL Server 2005 Express Edition x86: [2] Component Microsoft SQL Server 2005 Express Edition x86 returned an unexpected value.
[01/20/06,18:48:03] VS70pgui: [2] DepCheck indicates Microsoft SQL Server 2005 Express Edition x86 is not installed.
[01/20/06,19:22:40] Microsoft SQL Server 2005 Express Edition x86: [2] Component Microsoft SQL Server 2005 Express Edition x86 returned an unexpected value.
[01/20/06,19:22:45] VS70pgui: [2] DepCheck indicates Microsoft SQL Server 2005 Express Edition x86 is not installed.
***EndOfSession***