TurboTax 2009 can fail to install because it thinks the .NET Framework is not installed, even when it is

I’ve heard from a few customers over the past few days who have had trouble installing the new 2009 version of TurboTax.  In the cases I’ve heard about so far, the installer for TurboTax reports that the .NET Framework 3.5 SP1 is not correctly installed and instructs the user to re-install it.  Unfortunately, attempts to…

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Diagnosing and resolving 1935 errors for Win32 assemblies that occur on Windows Vista and later

Introduction 1935 errors can occur during an MSI-based installation while installing .NET assemblies or Win32 assemblies.  Most of the workarounds that can be found on blogs and forums (including all of the information in my 1935 error troubleshooting guide) only apply to 1935 errors that happen while installing .NET assemblies. This blog post will explain…

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October 2008 Cumulative Update packages for Media Center available for download

A couple of new cumulative update package for Windows Media Center have been released this week. The first is an update for Windows Vista Media Center that is called the October 2008 Cumulative Update for Media Center for Windows Vista and is also known as KB955519.  It is available for download in x86 and x64…

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Possible cause of Windows Vista and Windows Server 2008 OS update failures with error code 0x8000ffff

Recently, I was helping a colleague troubleshoot an installation error in the .NET Framework 3.5 SP1 on Windows Server 2008.  I wanted to describe the specific issue, and also explain how we narrowed down the issue because I think these troubleshooting techniques could be useful for investigating other types of .NET Framework 3.5 or 3.5…

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Possible cause of and workaround for XNA Game Studio Device Center crashes

We have heard from some customers about problems while using the XNA Game Studio Device Center to add Xbox 360 devices in XNA Game Studio 2.0 and to add Xbox 360 devices and Zune devices in the XNA Game Studio 3.0 CTP (for example, the Connect bugs that have been logged here and here as…

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How to uninstall the components of the .NET Framework 3.5 SP1

Question: As described in this blog post, I have been evaluating the beta of the .NET Framework 3.5 SP1 and Visual Studio 2008 SP1.  I ran into some issues running my application on a system with this software installed, so I need to uninstall it.  I have tried to uninstall the .NET Framework 3.5 SP1,…

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