Error code 8007007F when installing update for .NET Framework 3.5 SP1

Question

I have Windows Vista and have been running it for about 18 months.  About 6 months ago, my computer failed to install the update for .NET Framework 3.5 SP1.  And every few days since, it would try to install the update again.  It would appear to install, my computer would restart and then it would go through configuring the updates.  However, when it got to "configuring updates 3 of 3", it would slow down and then restart again and say "updates not configured properly, reverting changes."  I just tried to do a clean reboot and when trying the process again, it did not go to the "reverting changes" stage, but the update does not appear to be installed either. 

When I checked the update history, it says the update failed and gives the above error code.

I just tried to install the 2009 Turbo Tax program and this .NET Framework  error is preventing me from installing.

Help!!  Do I need to consider upgrading to Windows 7?  Is there a solution somewhere out there??

Answer 1

See...

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

http://blogs.msdn.com/astebner/archive/2010/01/26/9953883.aspx

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~Robear Dyer (PA Bear) ~ MS MVP (IE, Mail, Security, Windows & Update Services) since 2002 ~ Disclaimer: MS MVPs neither represent nor work for Microsoft

Answer 2

Hi,    

First let's Use the .NET Framework automatic cleanup tool

This tool is not intended as a substitute for the standard uninstall procedure. You should try to perform an uninstall by using the steps in Method 1, earlier in this article, before you use this cleanup tool.

The .NET Framework cleanup tool removes the .NET Framework for you. For information about how to obtain and use this tool, visit the following MSDN Web site:

**http://blogs.msdn.com/astebner/archive/2006/05/30/611355.aspx******

(**http://blogs.msdn.com/astebner/archive/2006/05/30/611355.aspx**)

Note This cleanup tool deletes shared files and registry keys that are used by multiple versions of the .NET Framework. To guarantee that all versions of the .NET Framework work correctly, if you run the cleanup tool to remove the .NET Framework, you must first remove all installed versions of the .NET Framework by using this cleanup tool. Then, you must reinstall all the previously installed versions starting with the lowest version number.

Suppose that you have the .NET Framework 1.1 and the .NET Framework 2.0 installed on your computer, and you plan to use this cleanup tool. In this scenario, you should use the cleanup tool to first remove the .NET Framework 1.1, and then use the cleanup tool to remove the .NET Framework 2.0. After you have removed both versions, you would then reinstall .NET Framework 1.1, and then install the .NET Framework 2.0, in that sequence. 

The third-party products that this article discusses are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, about the performance or reliability of these products.

After performing the above steps you need to restart your computer and then try to install the Turbotax and check if the issue gets resolved.

If the issue still persists then post back the exact error message you receive.

For more information on this you may refer the below Microsoft Article.

**http://support.microsoft.com/kb/923100**

Also refer the below link.

**http://social.answers.microsoft.com/Forums/en-US/vistawu/thread/a4f52425-6ca2-4564-8ea9-f460d99cd11f** 

Thanks and Regards:

I. Suuresh Kumar- Microsoft Support.

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