So here's the list of available modules in this directory. As you can see DnsShell is there.
PS C:\windows\system32> Get-Module -ListAvailable
Directory: C:\windows\system32\WindowsPowerShell\v1.0\Modules
ModuleType Name ExportedCommands
---------- ---- ----------------
Manifest ActiveDirectory {Get-ADRootDSE, New-ADObject, Rename- ADObject, Move-ADObject...}
Manifest AppLocker {Set-AppLockerPolicy, Get-AppLockerPolicy, Test-AppLockerPolicy, Get-AppLo...
Manifest BitsTransfer {Add-BitsFile, Remove-BitsTransfer, Complete-BitsTransfer, Get-BitsTransfe...
Manifest CimCmdlets {Get-CimAssociatedInstance, Get-CimClass, Get-CimInstance, Get-CimSession...}
Binary DnsShell
Script ISE {New-IseSnippet, Import-IseSnippet, Get- IseSnippet}
Manifest Microsoft.PowerShell.Diagnostics {Get-WinEvent, Get-Counter, Import-Counter, Export-Counter...}
Manifest Microsoft.PowerShell.Host {Start-Transcript, Stop-Transcript}
Manifest Microsoft.PowerShell.Management {Add-Content, Clear-Content, Clear- ItemProperty, Join-Path...}
Manifest Microsoft.PowerShell.Security {Get-Acl, Set-Acl, Get-PfxCertificate, Get-Credential...}
Manifest Microsoft.PowerShell.Utility {Format-List, Format-Custom, Format-Table, Format-Wide...}
Manifest Microsoft.WSMan.Management {Disable-WSManCredSSP, Enable- WSManCredSSP, Get-WSManCredSSP, Set-WSManQui...
Script PSDiagnostics {Disable-PSTrace, Disable- PSWSManCombinedTrace, Disable-WSManTrace, Enable...
Binary PSScheduledJob {New-JobTrigger, Add-JobTrigger, Remove-JobTrigger, Get-JobTrigger...}
Manifest PSWorkflow {New-PSWorkflowExecutionOption, New-PSWorkflowSession, nwsn}
Manifest PSWorkflowUtility Invoke-AsWorkflow
Manifest TroubleshootingPack {Get-TroubleshootingPack, Invoke-TroubleshootingPack}
When I run the command to Import-Module DnsShell, I get this error and I dont know why..
PS C:\windows\system32> Import-Module DnsShell
Import-Module : Could not load file or assembly
'file:///C:\windows\system32\WindowsPowerShell\v1.0\Modules\DnsShell\DnsShell.dll' or one of its dependencies. Operation is
not supported. (Exception from HRESULT: 0x80131515)
At line:1 char:1
+ Import-Module DnsShell
+ ~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : NotSpecified: (:) [Import-Module], FileLoadException
+ FullyQualifiedErrorId : System.IO.FileLoadException,Microsoft.PowerShell.Commands.ImportModuleCommand
Note: I would have posted pictures but I needed a rep of at least 10 in serverfault