Probleme install .Net Framework 3.5 vista

Bonjour,
[01/18/10,21:42:00] Microsoft .NET Framework 2.0SP1 (CBS): [2] Error: Installation failed for component Microsoft .NET Framework 2.0SP1 (CBS). MSI returned error code 34
[01/18/10,21:42:25] WapUI: [2] DepCheck indicates Microsoft .NET Framework 2.0SP1 (CBS) is not installed.
[01/18/10,23:53:54] Microsoft .NET Framework 2.0SP1 (CBS): [2] Error: Installation failed for component Microsoft .NET Framework 2.0SP1 (CBS). MSI returned error code 34
[01/18/10,23:54:35] WapUI: [2] DepCheck indicates Microsoft .NET Framework 2.0SP1 (CBS) is not installed.
[01/19/10,13:42:25] Microsoft .NET Framework 2.0SP1 (CBS): [2] Error: Installation failed for component Microsoft .NET Framework 2.0SP1 (CBS). MSI returned error code 34
[01/19/10,13:43:17] WapUI: [2] DepCheck indicates Microsoft .NET Framework 2.0SP1 (CBS) is not installed.
[01/21/10,15:20:13] WapUI: [2] DepCheck indicates Optional Component 'Microsoft .Net Framework 3.0' is not installed.
[01/21/10,15:39:37] WapUI: [2] DepCheck indicates Optional Component 'Microsoft .Net Framework 3.0' is not installed.
[01/21/10,15:52:02] Microsoft .NET Framework 3.5LP - FRA: [2] dlmgr: dlmgr::CDownloadJobURLMonImpl::Failed: URLMonError: Download failure (0x800c0005)
[01/21/10,15:52:02] Microsoft .NET Framework 3.5LP - FRA: [2] dlmgr: dlmgr::CDownloadJobURLMonImpl::Failed: URLMonError: Download failure (0x800c0005)
[01/21/10,15:52:03] Microsoft .NET Framework 3.5LP - FRA: [2] dlmgr: dlmgr::CDownloadJobURLMonImpl::Failed: URLMonError: Download failure (0x800c0005)
[01/21/10,15:52:03] Microsoft .NET Framework 3.5LP - FRA: [2] dlmgr: dlmgr::CDownloadJobURLMonImpl::Failed: URLMonError: Download failure (0x800c0005)
[01/21/10,15:52:04] Microsoft .NET Framework 3.5LP - FRA: [2] dlmgr: dlmgr::CDownloadJobURLMonImpl::Failed: URLMonError: Download failure (0x800c0005)
[01/21/10,15:52:04] Microsoft .NET Framework 3.5LP - FRA: [2] dlmgr: dlmgr::CDownloadJobURLMonImpl::Failed: URLMonError: Download failure (0x800c0005)
[01/21/10,15:52:04] Microsoft .NET Framework 3.5LP - FRA: [2] dlmgr: dlmgr::JobBase::Retry: all retries failed
[01/21/10,15:55:38] WapUI: [2] DepCheck indicates Optional Component 'Microsoft .Net Framework 3.0' is not installed.
[01/21/10,15:59:07] Windows Installer Patch Registration Fix for .NET Framework 3.5 (x86): [2] dlmgr: dlmgr::CDownloadJobURLMonImpl::Failed: URLMonError: Download failure (0x800c0005)
[01/21/10,15:59:07] Windows Installer Patch Registration Fix for .NET Framework 3.5 (x86): [2] dlmgr: dlmgr::CDownloadJobURLMonImpl::Failed: URLMonError: Download failure (0x800c0005)
[01/21/10,15:59:07] Windows Installer Patch Registration Fix for .NET Framework 3.5 (x86): [2] dlmgr: dlmgr::CDownloadJobURLMonImpl::Failed: URLMonError: Download failure (0x800c0005)
[01/21/10,15:59:08] Windows Installer Patch Registration Fix for .NET Framework 3.5 (x86): [2] dlmgr: dlmgr::CDownloadJobURLMonImpl::Failed: URLMonError: Download failure (0x800c0005)
[01/21/10,15:59:08] Windows Installer Patch Registration Fix for .NET Framework 3.5 (x86): [2] dlmgr: dlmgr::CDownloadJobURLMonImpl::Failed: URLMonError: Download failure (0x800c0005)
[01/21/10,15:59:08] Windows Installer Patch Registration Fix for .NET Framework 3.5 (x86): [2] dlmgr: dlmgr::CDownloadJobURLMonImpl::Failed: URLMonError: Download failure (0x800c0005)
[01/21/10,15:59:09] Windows Installer Patch Registration Fix for .NET Framework 3.5 (x86): [2] dlmgr: dlmgr::JobBase::Retry: all retries failed
[01/21/10,15:59:09] Windows Installer Patch Registration Fix for .NET Framework 3.5 (x86): [2] Failed to fetch setup file in CBaseComponent::PreInstall()
[01/21/10,15:59:09] setup.exe: [2] ISetupComponent::Pre/Post/Install() failed in ISetupManager::InternalInstallManager() with HRESULT -2147467260.
[01/21/10,15:59:09] setup.exe: [2] CSetupManager::RunInstallPhase() - Call to Pre/Install/Post for InstallComponents failed
[01/21/10,15:59:09] setup.exe: [2] CSetupManager::RunInstallPhaseAndCheckResults() - RunInstallPhase() returned a NULL piActionResults
[01/21/10,15:59:09] setup.exe: [2] CSetupManager::RunInstallFromList() - RunInstallPhaseAndCheckResults failed [2]
[01/21/10,15:59:10] setup.exe: [2] ISetupManager::RunInstallLists(IP_PREINSTALL failed in ISetupManager::RunInstallFromThread()
[01/21/10,15:59:10] setup.exe: [2] ISetupManager::RunInstallFromThread() failed in ISetupManager::RunInstall()
[01/21/10,15:59:10] setup.exe: [2] CSetupManager::Run() - Call to RunInstall() failed
[01/21/10,15:59:10] WapUI: [2] DepCheck indicates Windows Installer Patch Registration Fix for .NET Framework 3.5 (x86) is not installed.
[01/21/10,15:59:10] WapUI: [2] DepCheck indicates Optional Component 'Microsoft .Net Framework 3.0' was not attempted to be installed.
[01/21/10,15:59:10] WapUI: [2] DepCheck indicates Microsoft .NET Framework 2.0SP1 (CBS) was not attempted to be installed.
[01/21/10,15:59:11] WapUI: [2] DepCheck indicates Microsoft .NET Framework 3.0SP1 (CBS) was not attempted to be installed.
[01/21/10,15:59:11] WapUI: [2] DepCheck indicates Microsoft .NET Framework 3.5 'package' was not attempted to be installed.
[01/21/10,15:59:11] WapUI: [2] DepCheck indicates Microsoft .NET Framework 3.5LP - FRA was not attempted to be installed.
[01/21/10,22:26:35] WapUI: [2] DepCheck indicates Optional Component 'Microsoft .Net Framework 3.0' is not installed.
[01/21/10,23:08:50] WapUI: [2] DepCheck indicates Optional Component 'Microsoft .Net Framework 3.0' is not installed.
[01/23/10,16:28:17] WapUI: [2] DepCheck indicates Optional Component 'Microsoft .Net Framework 3.0' is not installed.