Summary: Easily determine the version of Windows PowerShell that is installed.

 How can I determine what version of Windows PowerShell is installed on my computer?

 Use the $psversiontable automatic variable, which is available in Windows PowerShell 2.0 and Windows PowerShell 3.0. 
          (If nothing comes back, you are running Windows PowerShell 1.0.)

PS C:> $PSVersionTable

Name                           Value

—-                           —–

PSVersion                      3.0

WSManStackVersion              3.0

SerializationVersion           1.1.0.1

CLRVersion                     4.0.30319.18046

BuildVersion                   6.2.9200.16434

PSCompatibleVersions           {1.0, 2.0, 3.0}

PSRemotingProtocolVersion      2.2

To return only the version, access the PSVersion property:

PS C:> $PSVersionTable.PSVersion

Major  Minor  Build  Revision

—–  —–  —–  ——–

3      0      -1     -1