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This is the built-in help made by Microsoft for the document 'about_Windows_RT', in PowerShell version 5 - as retrieved from Windows version 'Microsoft Windows Server 2012 R2 Standard' PowerShell help files on 2016-06-24.

For PowerShell version 3 and up, where you have Update-Help, this command was run just before creating the web pages from the help files.

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Explains limitations of Windows PowerShell 4.0 on Windows RT 8.1.

The Windows RT 8.1 operating system is installed on computers
and devices (such as Microsoft Surface 2, on which it is the
operating system that ships with the computer) that use Advanced
RISC Machine (ARM) processors.

Windows PowerShell 4.0 is included in Windows RT 8.1. All cmdlets,
providers, and modules, and most scripts designed for Windows
PowerShell 2.0 and later releases run on Windows RT 8.1
without changes.

Because Windows RT 8.1 does not include all Windows features,
some Windows PowerShell features work differently or do
not work on Windows RT-based devices. The following list
explains the differences.

-- Windows PowerShell ISE is not included in and cannot run
on Windows RT 8.1. Windows PowerShell ISE requires Windows
Presentation Foundation, which is not included in
Windows RT 8.1.

-- Windows PowerShell remoting and the WinRM service
are disabled by default. To enable remoting, run the
Enable-PSRemoting cmdlet. Also, run the Set-Service
cmdlet to set the startup type of the WinRM service
to Automatic, or Automatic (Delayed Start).

While remoting is disabled, you can use Windows PowerShell
remoting to run commands on other computers, but other
computers cannot run commands on the Windows RT device.
Also, implicit remoting—that is, remoting that is built in
to a cmdlet or script, and not explicitly requested with added
parameters—does not work in Windows PowerShell running on
Windows RT 8.1.

-- Domain-joined computing and Kerberos authentication are
not supported on Windows RT 8.1. You cannot use Windows PowerShell
to add or manage these features.

-- Microsoft .NET Framework classes that are not supported
on Windows RT 8.1 are also not supported by Windows PowerShell
on Windows RT 8.1.

-- Transactions are not enabled on Windows RT 8.1. Transaction
cmdlets, such as Start-Transaction, and transaction
parameters, such as UseTransaction, do not work properly.

-- All Windows PowerShell sessions on Windows RT 8.1 devices use
the ConstrainedLanguage language mode. ConstrainedLanguage language
mode is a companion to User Mode Code Integrity (UMCI). It permits
all Windows cmdlets and Windows PowerShell language elements, but
restricts types to ensure that users cannot use Windows PowerShell
to circumvent or violate the UMCI protections.

For more information about ConstrainedLanguage language mode, see

Windows PowerShell System Requirements: