dotNETFXRedist_x86.msm must not be used to redistribute the .NET Framework
The .NET Framework merge module (dotNETFXRedist_x86.msm) is no longer shipped with Visual Studio. It was added to a project as a mechanism for checking dependencies, and is excluded by default.
To correct this error
In Solution Explorer, select the dotNETFXRedist_x86.msm merge module.
In the Properties window, select the Exclude property and set it to true.