Hello,Today I've installed dotnet framework 3.5 SP1 in my admin server. My Operating system is Windows 2003 server, standard edition with 64 bit. First I've downloaded framework from http://download.microsoft.com/download/6/0/f/60fc5854-3cb8-4892-b6db-bd4f42510f28/dotnetfx35.exe. When I try to install it threw some error, and asked to install 64 bit version with beloe error log.[03/08/10,19:18:26] Windows Installer Patch Registration Fix for .NET Framework 3.5 (x64): [2] Failed to fetch setup file in CBaseComponent::PreInstall()[03/08/10,19:18:26] setup.exe: [2] ISetupComponent::Pre/Post/Install() failed in ISetupManager::InternalInstallManager() with HRESULT -2147467260.[03/08/10,19:18:26] setup.exe: [2] CSetupManager::RunInstallPhase() - Call to Pre/Install/Post for InstallComponents failed[03/08/10,19:18:26] setup.exe: [2] CSetupManager::RunInstallPhaseAndCheckResults() - RunInstallPhase() returned a NULL piActionResults[03/08/10,19:18:26] setup.exe: [2] CSetupManager::RunInstallFromList() - RunInstallPhaseAndCheckResults failed [2][03/08/10,19:18:26] setup.exe: [2] ISetupManager::RunInstallLists(IP_PREINSTALL failed in ISetupManager::RunInstallFromThread()[03/08/10,19:18:26] setup.exe: [2] ISetupManager::RunInstallFromThread() failed in ISetupManager::RunInstall()[03/08/10,19:18:26] setup.exe: [2] CSetupManager::Run() - Call to RunInstall() failed[03/08/10,19:18:26] WapUI: [2] DepCheck indicates Windows Installer Patch Registration Fix for .NET Framework 3.5 (x64) is not installed.[03/08/10,19:18:26] WapUI: [2] DepCheck indicates Microsoft .NET Framework 2.0a x64 was not attempted to be installed.[03/08/10,19:18:26] WapUI: [2] DepCheck indicates XPSEPSC x64 Installer was not attempted to be installed.[03/08/10,19:18:26] WapUI: [2] DepCheck indicates Microsoft .NET Framework 3.0 SP2 x64 was not attempted to be installed.[03/08/10,19:18:26] WapUI: [2] DepCheck indicates Microsoft .NET Framework 3.5 (x64) 'package' was not attempted to be installed.[03/08/10,19:37:35] Microsoft .NET Framework 2.0a x64: [2] Error: Installation failed for component Microsoft .NET Framework 2.0a x64. MSI returned error code 1603[03/08/10,19:40:06] WapUI: [2] DepCheck indicates Microsoft .NET Framework 2.0a x64 is not installed.At this movement My central Admin stopped working and throwing "You are not autherised to view this page" error. Then I've installed 3.5 with SP1 framework from http://download.microsoft.com/download/2/0/e/20e90413-712f-438c-988e-fdaa79a8ac3d/dotnetfx35.exe. This time it installed successfully, but still not able to recover the CA.I've tried aspnet_regiis, restarting the IIS. Please let me know if anyone knew the solution to bring my CA up and running.Thanks,Vikram