I cannot create or open a Unit Test project in Visual Studio 2012 RC

I keep getting errors when opening or creating a unit test project in Visual Studio 2012 RC. Where can I find answers to the question of how to solve this problem. I tried several repair units. I tried uninstalling and reinstalling. I uninstalled everything except the few extensions that come with the product (NuGet). Any help in fixing this error or where I can get help would be welcome.

The 'Microsoft.VisualStudio.TestTools.Tips.TuipPackage.TuipPackage, Microsoft.VisualStudio.QualityTools.Tips.TuipPackage, Version=11.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' package did not load correctly.

The problem may have been caused by a configuration change or by the installation of another extension. You can get more information by examining the file 'C:\Users\Me\AppData\Roaming\Microsoft\VisualStudio\11.0\ActivityLog.xml'.

I believe this is the appropriate section from this file:

Entering function CVsPackageInfo::HrInstantiatePackage {52CBD135-1F97-2580-011F-C7CD052E44DE}

Begin package loadBegin package load {52CBD135-1F97-2580-011F-C7CD052E44DE}

ERROR SetSite failed for packageSetSite failed for package {52CBD135-1F97-2580-011F-C7CD052E44DE} 80070057 - E_INVALIDARG

ERROR End package loadEnd package load {52CBD135-1F97-2580-011F-C7CD052E44DE} 80070057 - E_INVALIDARG

Entering function CVsPackageInfo::HrInstantiatePackage {52CBD135-1F97-2580-011F-C7CD052E44DE}

Begin package loadBegin package load {52CBD135-1F97-2580-011F-C7CD052E44DE}

ERROR SetSite failed for packageSetSite failed for package {52CBD135-1F97-2580-011F-C7CD052E44DE} 80070057 - E_INVALIDARG

ERROR End package loadEnd package load {52CBD135-1F97-2580-011F-C7CD052E44DE} 80070057 - E_INVALIDARG
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2 answers

As I stopped receiving the error message, I deleted the following sections in the .sln file that looked something like this:

ProjectSection(SolutionItems) = preProject
    SomeName.vsmdi = SomeName.vsmdi
    Local.testsettings = Local.testsettings
    TraceAndTestImpact.testsettings = TraceAndTestImpact.testsettings
EndProjectSection

and this:

GlobalSection(TestCaseManagementSettings) = postSolution
    CategoryFile = SomeName.vsmdi
EndGlobalSection
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, visual studio 2010 2012 , 2012 RC . .

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