There are a few requirements for installing PowerShell on Windows:

1. Confirm that you have sufficient security privileges for installing software on Windows
2. Verify that the pre-requisite—version 2.0 of the .NET Framework—is installed (and patched)
3. Make sure that your system is up-to-date with its Service Pack and patches:

   Windows Version	Minimum Service Pack
   Windows Server 2008	Service Pack 2
   Windows Vista	Service Pack 2
   Windows Server 2003 R2	Service Pack 2
   Windows Server 2003	Service Pack 2
   Windows XP	Service Pack 3

PowerShell should already be installed and enabled. Inability to run PowerShell on a Windows 7 or Windows Server 2008 R2 machine indicates a problem, or it has been removed/locked down by your system administrator.

1. Review the information on the Windows Management Framework Core update
2. Download the update package (“Windows6.0-KB968930-*.msu”) that is appropriate for your computer’s processor architecture
3. Double-click on the “Windows6.0-KB968930-*.msu” file (that you just downloaded) to install it

1. Verify that version 2.0 of the .NET Framework is installed:
   1. Open the Windows® Run dialog box
      1. Press the + keys
   2. Type Cmd.exe into the Open text box and press the key

   3. At the command prompt, type the following command line and press the key:

      dir %SYSTEMROOT%\Microsoft.NET\Framework\ /AD /B

   4. The .NET Framework pre-requisite is satisfied if the dir output of the command includes a substring of “v2.0.50727″. Otherwise, download and install version 2.0 or later of the .NET Framework

      • You could (and probably should) install the latest version (each release of the .NET Framework includes each of the ones that precede it)
      • Be sure to check for and apply Windows updates afterward; there are Service Packs and patches for each version of the .NET Framework!
2. Review the information on the Windows Management Framework Core update
3. Download the installation program (“WindowsServer2003-KB968930-*-ENG.exe”) that is appropriate for your computer’s processor architecture
4. Double-click on the “WindowsServer2003-KB968930-*-ENG.exe” file (that you just downloaded) to install it

1. Verify that version 2.0 of the .NET Framework is installed:
   1. Open the Windows® Run dialog box
      1. Press the + keys
   2. Type Cmd.exe into the Open text box and press the key

   3. At the command prompt, type the following command line and press the key:

      dir %SYSTEMROOT%\Microsoft.NET\Framework\ /AD /B

   4. The .NET Framework pre-requisite is satisfied if the dir output of the command includes a substring of “v2.0.50727″. Otherwise, download and install version 2.0 or later of the .NET Framework

      • You could (and probably should) install the latest version—each release of the .NET Framework includes each of the ones that precede it
      • Be sure to check for and apply Windows updates afterward; there are Service Packs and patches for each version of the .NET Framework!
2. Review the information on the Windows Management Framework Core update
3. Download the installation program (“WindowsXP-KB968930-x86-ENG.exe”)
4. Double-click on the “WindowsXP-KB968930-x86-ENG.exe” file (that you just downloaded) to install it

PowerShell cannot be installed on Windows 2000… it’s time to upgrade!