Failed to generate a user instance of SQL Server ...

Error:

Failed to generate a user instance of SQL Server due to a failure in starting the process for the user instance.

I get this error when I test the connection (see the attached screen shot).

I have done this in another computer successfully.

Question: What changes I need to apply to either VS2010 or SQL 2008 SP3 to eliminate this error?

Thank you.
ConnectionError.png
LVL 34
Mike EghtebasDatabase and Application DeveloperAsked:
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Mike EghtebasDatabase and Application DeveloperAuthor Commented:
I haven't figured out yet. But this is the connection string I have:

Data Source=.\SQLEXPRESS;AttachDbFilename="C:\Users\Mike\Documents\__smc\_CS 32 ADO\WSCGSoftwareDatabase\WSCGSoftware.mdf";Integrated Security=True;Connect Timeout=30;User Instance=True
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Microsoft SQL Server 2008

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