PowerShell gives you an easy way to determine what version is installed on your computer.  Use the automatic variable $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