Visual Studio 2010 SP1 error: silverlight_sdk.msi not available

I have been trying to install the Visual Studio 2010 SP1 on my Windows 7 Ultimate computer. Each time it failed with a frustrating message saying the installation package silverlight_sdk.msi is not available. If are experiencing the same problem, find the solution that worked for me.

I have been trying to install Visual Studio 2010 SP1 on my computer, which runs on Windows 7 Ultimate. In fact, I already had SP1 on my computer, but when I try to install Windows Phone 7.5 SDK, it was failing saying some required components were missing. So I decided to reapply the SP1 on Visual Studio. I think the fundamental problem was, I recently uninstalled Visual Studio Lightswitch, which removed some required components from Visual Studio, but not really sure.

I tried installing and uninstalling Visual Studio 2010 SP1 and each time the installation was stuck with the message:

The feature you are trying to use is on a network resource that is unavailable.

Click OK to try again, or enter an alternate path to a folder containing the installation package 'silverlight_sdk.msi' in the box below.

I could not locate the silverlight_sdk.msi anywhere on my computer and could not download it from the web either. I really visual the Visual Studio SP1 installer was smart enough to go and find it from its home!

I downloaded the web installer and regular .iso image of the VS 2010 SP1 and downloaded various Silverlight tools and SDK hoping that will resolve this error. All of my efforts to install Visual Studio 2010 SP1 failed with the error in finding silverlight_sdk.msi.

I almost gave up on installing Visual Studio 2010 SP1, but finally I found a solution that worked!

If you are getting the error "silverlight_sdk.msi not found" while installing the Visual Studio Service Pack 1, follow the steps below:

1. Download "Microsoft Silverlight 4 Tools for Visual Studio 2010, but do not install.

2. Rename the downloaded installer file "Silverlight4_Tools.exe" to "Silverlight4_Tools.rar".

3. Extract the .rar file using tools like 7zip.

4. You can find the file silvelright_sdk.msi in the extracted files.

5. Go back to your Visual Studio 2010 SP1 installer. If you are still on the error window, click the browse button to browse and choose the silvelright_sdk.msi from the folder where you extracted the files.

In my case, the installation process completed smoothly after I followed the above steps.

Did this solution work for you? Post your feedback. I think Microsoft should know how frustrating this experience is and they should make the installation process much more smooth.

Article by Tony John
Tony John is a professional blogger from India, who started his first Weblog in 1998 at Tony switched to blogging as a passion blended business in the year 2000 and currently operates several popular web properties including,, and many more.

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Guest Author: Mathew28 Mar 2012

Worked flawlessly for silverlight_sdk. But facing issue with RiaServices.msi not. I will try same technique here.

Thanks a lot

Guest Author: Chris13 Dec 2012

I agree, utterly ridiculous that Microsoft pushes a service pack installer with such a glaring issue as this and does nothing to fix it.

Guest Author: dinhhungitsoft11 Jun 2013

I have ever encounted this problem and it was a result of invalid installation path. You need to browse for valid path and continue the installation without any errors.

Guest Author: Shalini05 Jan 2014

Thanks a ton for the solution. I really appreciate. I have wasted 2 full days trying to resolve this issue. It was very frustrating. Thanks again.

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