Unknown Error preventing VS 2010 from start after uninstall VS 11 Beta

You might hit the error “Unknown Error” after uninstalled VS 11 Beta and .NET Framework 4.5 in the same machine that you have VS 2010. See the pictures below.



I uninstalled everything for VS 2010 and reinstall it to solve the problem. Somehow I realized when you uninstalled .NET Framework 4.5 Beta then .NET Framework 4 Extended and Client Profile will all be uninstalled. You can try to just install .NET Framework 4 back into your machine and see whether VS 2010 can work again.

About chanmingman

Since March 2011 Microsoft Live Spaces migrated to Wordpress (http://www.pcworld.com/article/206455/Microsoft_Live_Spaces_Moves_to_WordPress_An_FAQ.html) till now, I have is over 1 million viewers. This blog is about more than 50% telling you how to resolve error messages, especial for Microsoft products. The blog also has a lot of guidance teaching you how to get stated certain Microsoft technologies. The blog also uses as a help to keep my memory. The blog is never meant to give people consulting services or silver bullet solutions. It is a contribution to the community. Thanks for your support over the years. Ming Man is Microsoft MVP since year 2006. He is a software development manager for a multinational company. With 25 years of experience in the IT field, he has developed system using Clipper, COBOL, VB5, VB6, VB.NET, Java and C #. He has been using Visual Studio (.NET) since the Beta back in year 2000. He and the team have developed many projects using .NET platform such as SCM, and HR based applications. He is familiar with the N-Tier design of business application and is also an expert with database experience in MS SQL, Oracle and AS 400.
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