How to fix DNX/DNVM in Visual Studio 2015?

Question

Today I installed VS 2015 on Windows 7 x64. Mainly to test new .Net Core features and etc. And for test I created new C# "Console Application (Package)" solution and got this message:

DNX SDK version 'dnx-clr-win-x86.1.0.0-beta5' failed to install. The solution will use DNX SDK version ‘dnx-clr-win-x86.1.0.0-beta5’ for this session.

I can't compile and debug project. Also, when I have opened debug tab in project properties then VS crashed.

DNVM output when I opened solution:

Invoke-Command : The term 'x86' is not recognized as the name of a cmdlet, func
tion, script file, or operable program. Check the spelling of the name, or if a
 path was included, verify that the path is correct and try again.
C:\Program Files\Microsoft DNX\Dnvm\dnvm.ps1:1451 ????:27
+             Invoke-Command <<<<  ([ScriptBlock]::Create("dnvm-$cmd $cmdargs")
)
    + CategoryInfo          : ObjectNotFound: (x86:String) [Invoke-Command], C 
   ommandNotFoundException
    + FullyQualifiedErrorId : CommandNotFoundException,Microsoft.PowerShell.Co 
   mmands.InvokeCommandCommand

Invoke-Command : The term 'x86' is not recognized as the name of a cmdlet, func
tion, script file, or operable program. Check the spelling of the name, or if a
 path was included, verify that the path is correct and try again.
C:\Program Files\Microsoft DNX\Dnvm\dnvm.ps1:1451 ????:27
+             Invoke-Command <<<<  ([ScriptBlock]::Create("dnvm-$cmd $cmdargs")
)
    + CategoryInfo          : ObjectNotFound: (x86:String) [Invoke-Command], C 
   ommandNotFoundException
    + FullyQualifiedErrorId : CommandNotFoundException,Microsoft.PowerShell.Co 
   mmands.InvokeCommandCommand

Invoke-Command : The term 'x86' is not recognized as the name of a cmdlet, func
tion, script file, or operable program. Check the spelling of the name, or if a
 path was included, verify that the path is correct and try again.
C:\Program Files\Microsoft DNX\Dnvm\dnvm.ps1:1451 ????:27
+             Invoke-Command <<<<  ([ScriptBlock]::Create("dnvm-$cmd $cmdargs")
)
    + CategoryInfo          : ObjectNotFound: (x86:String) [Invoke-Command], C 
   ommandNotFoundException
    + FullyQualifiedErrorId : CommandNotFoundException,Microsoft.PowerShell.Co 
   mmands.InvokeCommandCommand

Any ideas how to fix it?

Also, I have previously installed VS 2015 Preview and DNX/DNVM separately. But I think, I completely removed it before VS 2015 installation. Could this somehow affects current VS installation?

Answer 1

This is a known issue.

ASP.NET 5: On Windows 7 SP1, DNX SDK cannot be installed without Powershell 3.0.

Symptoms

When you create an ASP.NET 5 project, you receive the following error message:

DNX SDK version 'dnx-clr-win-x86.1.0.0-beta5' failed to install. The solution will use DNX SDK version 'dnx-clr-win-x86-1.0.0-beta5' for this session

Workaround

To work around this issue, install Windows Powershell 3.0 (or higher) and try to create the project again. To see your current PS version, run $PsVersionTable command (details).

Links:

• How to Install Windows PowerShell 4.0.
• Install PowerShell 3.0 on Windows 7.