PowerShell Version 4 is available in Windows 8.1 & Windows Server 2012 R2.
How to find PowerShell Version?
PS C:\> $psversiontable

Available CMDLETs of Module "Microsoft.PowerShell.Management".

PS C:\> Get-Command -Module Microsoft.PowerShell.Management
CommandType     Name                                               ModuleName
-----------     ----                                               ----------
Cmdlet          Add-Computer                                       Microsoft.PowerShell.Management
Cmdlet          Add-Content                                        Microsoft.PowerShell.Management
Cmdlet          Checkpoint-Computer                                Microsoft.PowerShell.Management
Cmdlet          Clear-Content                                      Microsoft.PowerShell.Management
Cmdlet          Clear-EventLog                                     Microsoft.PowerShell.Management
Cmdlet          Clear-Item                                         Microsoft.PowerShell.Management
Cmdlet          Clear-ItemProperty                                 Microsoft.PowerShell.Management
Cmdlet          Complete-Transaction                               Microsoft.PowerShell.Management
Cmdlet          Convert-Path                                       Microsoft.PowerShell.Management
Cmdlet          Copy-Item                                          Microsoft.PowerShell.Management
Cmdlet          Copy-ItemProperty                                  Microsoft.PowerShell.Management
Cmdlet          Debug-Process                                      Microsoft.PowerShell.Management
Cmdlet          Disable-ComputerRestore                            Microsoft.PowerShell.Management
Cmdlet          Enable-ComputerRestore                             Microsoft.PowerShell.Management
Cmdlet          Get-ChildItem                                      Microsoft.PowerShell.Management
Cmdlet          Get-ComputerRestorePoint                           Microsoft.PowerShell.Management
Cmdlet          Get-Content                                        Microsoft.PowerShell.Management
Cmdlet          Get-ControlPanelItem                               Microsoft.PowerShell.Management
Cmdlet          Get-EventLog                                       Microsoft.PowerShell.Management
Cmdlet          Get-HotFix                                         Microsoft.PowerShell.Management
Cmdlet          Get-Item                                           Microsoft.PowerShell.Management
Cmdlet          Get-ItemProperty                                   Microsoft.PowerShell.Management
Cmdlet          Get-Location                                       Microsoft.PowerShell.Management
Cmdlet          Get-Process                                        Microsoft.PowerShell.Management
Cmdlet          Get-PSDrive                                        Microsoft.PowerShell.Management
Cmdlet          Get-PSProvider                                     Microsoft.PowerShell.Management
Cmdlet          Get-Service                                        Microsoft.PowerShell.Management
Cmdlet          Get-Transaction                                    Microsoft.PowerShell.Management
Cmdlet          Get-WmiObject                                      Microsoft.PowerShell.Management
Cmdlet          Invoke-Item                                        Microsoft.PowerShell.Management
Cmdlet          Invoke-WmiMethod                                   Microsoft.PowerShell.Management
Cmdlet          Join-Path                                          Microsoft.PowerShell.Management
Cmdlet          Limit-EventLog                                     Microsoft.PowerShell.Management
Cmdlet          Move-Item                                          Microsoft.PowerShell.Management
Cmdlet          Move-ItemProperty                                  Microsoft.PowerShell.Management
Cmdlet          New-EventLog                                       Microsoft.PowerShell.Management
Cmdlet          New-Item                                           Microsoft.PowerShell.Management
Cmdlet          New-ItemProperty                                   Microsoft.PowerShell.Management
Cmdlet          New-PSDrive                                        Microsoft.PowerShell.Management
Cmdlet          New-Service                                        Microsoft.PowerShell.Management
Cmdlet          New-WebServiceProxy                                Microsoft.PowerShell.Management
Cmdlet          Pop-Location                                       Microsoft.PowerShell.Management
Cmdlet          Push-Location                                      Microsoft.PowerShell.Management
Cmdlet          Register-WmiEvent                                  Microsoft.PowerShell.Management
Cmdlet          Remove-Computer                                    Microsoft.PowerShell.Management
Cmdlet          Remove-EventLog                                    Microsoft.PowerShell.Management
Cmdlet          Remove-Item                                        Microsoft.PowerShell.Management
Cmdlet          Remove-ItemProperty                                Microsoft.PowerShell.Management
Cmdlet          Remove-PSDrive                                     Microsoft.PowerShell.Management
Cmdlet          Remove-WmiObject                                   Microsoft.PowerShell.Management
Cmdlet          Rename-Computer                                    Microsoft.PowerShell.Management
Cmdlet          Rename-Item                                        Microsoft.PowerShell.Management
Cmdlet          Rename-ItemProperty                                Microsoft.PowerShell.Management
Cmdlet          Reset-ComputerMachinePassword                      Microsoft.PowerShell.Management
Cmdlet          Resolve-Path                                       Microsoft.PowerShell.Management
Cmdlet          Restart-Computer                                   Microsoft.PowerShell.Management
Cmdlet          Restart-Service                                    Microsoft.PowerShell.Management
Cmdlet          Restore-Computer                                   Microsoft.PowerShell.Management
Cmdlet          Resume-Service                                     Microsoft.PowerShell.Management
Cmdlet          Set-Content                                        Microsoft.PowerShell.Management
Cmdlet          Set-Item                                           Microsoft.PowerShell.Management
Cmdlet          Set-ItemProperty                                   Microsoft.PowerShell.Management
Cmdlet          Set-Location                                       Microsoft.PowerShell.Management
Cmdlet          Set-Service                                        Microsoft.PowerShell.Management
Cmdlet          Set-WmiInstance                                    Microsoft.PowerShell.Management
Cmdlet          Show-ControlPanelItem                              Microsoft.PowerShell.Management
Cmdlet          Show-EventLog                                      Microsoft.PowerShell.Management
Cmdlet          Split-Path                                         Microsoft.PowerShell.Management
Cmdlet          Start-Process                                      Microsoft.PowerShell.Management
Cmdlet          Start-Service                                      Microsoft.PowerShell.Management
Cmdlet          Start-Transaction                                  Microsoft.PowerShell.Management
Cmdlet          Stop-Computer                                      Microsoft.PowerShell.Management
Cmdlet          Stop-Process                                       Microsoft.PowerShell.Management
Cmdlet          Stop-Service                                       Microsoft.PowerShell.Management
Cmdlet          Suspend-Service                                    Microsoft.PowerShell.Management
Cmdlet          Test-ComputerSecureChannel                         Microsoft.PowerShell.Management
Cmdlet          Test-Connection                                    Microsoft.PowerShell.Management
Cmdlet          Test-Path                                          Microsoft.PowerShell.Management
Cmdlet          Undo-Transaction                                   Microsoft.PowerShell.Management
Cmdlet          Use-Transaction                                    Microsoft.PowerShell.Management
Cmdlet          Wait-Process                                       Microsoft.PowerShell.Management
Cmdlet          Write-EventLog                                     Microsoft.PowerShell.Management
Default installed modules
PS C:\> Get-Module
ModuleType Version    Name                                ExportedCommands
---------- -------    ----                                ----------------
Manifest   3.1.0.0    Microsoft.PowerShell.Management     {Add-Computer, Add-Content, Checkpoint-Computer, Clear-Con...
Manifest   3.1.0.0    Microsoft.PowerShell.Utility        {Add-Member, Add-Type, Clear-Variable, Compare-Object...}
Default available modules
PS C:\> Get-Module -ListAvailable

Directory: C:\Windows\system32\WindowsPowerShell\v1.0\Modules

ModuleType Version    Name                                ExportedCommands
---------- -------    ----                                ----------------
Manifest   1.0.0.0    AppBackgroundTask                   {Disable-AppBackgroundTaskDiagnosticLog, Enable-AppBackgro...
Manifest   2.0.0.0    AppLocker                           {Get-AppLockerFileInformation, Get-AppLockerPolicy, New-Ap...
Manifest   2.0.0.0    Appx                                {Add-AppxPackage, Get-AppxPackage, Get-AppxPackageManifest...
Manifest   1.0.0.0    BitLocker                           {Unlock-BitLocker, Suspend-BitLocker, Resume-BitLocker, Re...
Manifest   1.0.0.0    BitsTransfer                        {Add-BitsFile, Complete-BitsTransfer, Get-BitsTransfer, Re...
Manifest   1.0.0.0    BranchCache                         {Add-BCDataCacheExtension, Clear-BCCache, Disable-BC, Disa...
Manifest   1.0.0.0    CimCmdlets                          {Get-CimAssociatedInstance, Get-CimClass, Get-CimInstance,...
Manifest   1.0        Defender                            {Get-MpPreference, Set-MpPreference, Add-MpPreference, Rem...
Manifest   1.0.0.0    DirectAccessClientComponents        {Disable-DAManualEntryPointSelection, Enable-DAManualEntry...
Script     2.0        Dism                                {Add-AppxProvisionedPackage, Add-WindowsDriver, Add-Window...
Manifest   1.0.0.0    DnsClient                           {Resolve-DnsName, Clear-DnsClientCache, Get-DnsClient, Get...
Manifest   2.0.0.0    International                       {Get-WinDefaultInputMethodOverride, Set-WinDefaultInputMet...
Manifest   1.0.0.0    iSCSI                               {Get-IscsiTargetPortal, New-IscsiTargetPortal, Remove-Iscs...
Script     1.0.0.0    ISE                                 {New-IseSnippet, Import-IseSnippet, Get-IseSnippet}
Manifest   1.0.0.0    Kds                                 {Add-KdsRootKey, Get-KdsRootKey, Test-KdsRootKey, Set-KdsC...
Manifest   3.0.0.0    Microsoft.PowerShell.Diagnostics    {Get-WinEvent, Get-Counter, Import-Counter, Export-Counter...
Manifest   3.0.0.0    Microsoft.PowerShell.Host           {Start-Transcript, Stop-Transcript}
Manifest   3.1.0.0    Microsoft.PowerShell.Management     {Add-Content, Clear-Content, Clear-ItemProperty, Join-Path...
Manifest   3.0.0.0    Microsoft.PowerShell.Security       {Get-Acl, Set-Acl, Get-PfxCertificate, Get-Credential...}
Manifest   3.1.0.0    Microsoft.PowerShell.Utility        {Format-List, Format-Custom, Format-Table, Format-Wide...}
Manifest   3.0.0.0    Microsoft.WSMan.Management          {Disable-WSManCredSSP, Enable-WSManCredSSP, Get-WSManCredS...
Manifest   1.0        MMAgent                             {Disable-MMAgent, Enable-MMAgent, Set-MMAgent, Get-MMAgent...
Manifest   1.0.0.0    MsDtc                               {New-DtcDiagnosticTransaction, Complete-DtcDiagnosticTrans...
Manifest   2.0.0.0    NetAdapter                          {Disable-NetAdapter, Disable-NetAdapterBinding, Disable-Ne...
Manifest   1.0.0.0    NetConnection                       {Get-NetConnectionProfile, Set-NetConnectionProfile}
Manifest   1.0.0.0    NetEventPacketCapture               {New-NetEventSession, Remove-NetEventSession, Get-NetEvent...
Manifest   2.0.0.0    NetLbfo                             {Add-NetLbfoTeamMember, Add-NetLbfoTeamNic, Get-NetLbfoTea...
Manifest   1.0.0.0    NetNat                              {Get-NetNat, Get-NetNatExternalAddress, Get-NetNatStaticMa...
Manifest   2.0.0.0    NetQos                              {Get-NetQosPolicy, Set-NetQosPolicy, Remove-NetQosPolicy, ...
Manifest   2.0.0.0    NetSecurity                         {Get-DAPolicyChange, New-NetIPsecAuthProposal, New-NetIPse...
Manifest   1.0.0.0    NetSwitchTeam                       {New-NetSwitchTeam, Remove-NetSwitchTeam, Get-NetSwitchTea...
Manifest   1.0.0.0    NetTCPIP                            {Get-NetIPAddress, Get-NetIPInterface, Get-NetIPv4Protocol...
Manifest   1.0.0.0    NetworkConnectivityStatus           {Get-DAConnectionStatus, Get-NCSIPolicyConfiguration, Rese...
Manifest   1.0.0.0    NetworkTransition                   {Add-NetIPHttpsCertBinding, Disable-NetDnsTransitionConfig...
Manifest   1.0.0.0    PCSVDevice                          {Get-PcsvDevice, Start-PcsvDevice, Stop-PcsvDevice, Restar...
Manifest   1.0.0.0    PKI                                 {Add-CertificateEnrollmentPolicyServer, Export-Certificate...
Manifest   1.1        PrintManagement                     {Add-Printer, Add-PrinterDriver, Add-PrinterPort, Get-Prin...
Binary     1.0        PSDesiredStateConfiguration         {Set-DSCLocalConfigurationManager, Start-DSCConfiguration,...
Script     1.0.0.0    PSDiagnostics                       {Disable-PSTrace, Disable-PSWSManCombinedTrace, Disable-WS...
Binary     1.1.0.0    PSScheduledJob                      {New-JobTrigger, Add-JobTrigger, Remove-JobTrigger, Get-Jo...
Manifest   2.0.0.0    PSWorkflow                          {New-PSWorkflowExecutionOption, New-PSWorkflowSession, nwsn}
Manifest   1.0.0.0    PSWorkflowUtility                   Invoke-AsWorkflow
Manifest   1.0.0.0    ScheduledTasks                      {Get-ScheduledTask, Set-ScheduledTask, Register-ScheduledT...
Manifest   2.0.0.0    SecureBoot                          {Confirm-SecureBootUEFI, Set-SecureBootUEFI, Get-SecureBoo...
Manifest   2.0.0.0    SmbShare                            {Get-SmbShare, Remove-SmbShare, Set-SmbShare, Block-SmbSha...
Manifest   2.0.0.0    SmbWitness                          {Get-SmbWitnessClient, Move-SmbWitnessClient, gsmbw, msmbw...
Manifest   1.0.0.0    StartScreen                         {Export-StartLayout, Import-StartLayout, Get-StartApps}
Manifest   2.0.0.0    Storage                             {Add-InitiatorIdToMaskingSet, Add-PartitionAccessPath, Add...
Manifest   2.0.0.0    TLS                                 {New-TlsSessionTicketKey, Enable-TlsSessionTicketKey, Disa...
Manifest   1.0.0.0    TroubleshootingPack                 {Get-TroubleshootingPack, Invoke-TroubleshootingPack}
Manifest   2.0.0.0    TrustedPlatformModule               {Get-Tpm, Initialize-Tpm, Clear-Tpm, Unblock-Tpm...}
Manifest   2.0.0.0    VpnClient                           {Add-VpnConnection, Set-VpnConnection, Remove-VpnConnectio...
Manifest   1.0.0.0    Wdac                                {Get-OdbcDriver, Set-OdbcDriver, Get-OdbcDsn, Add-OdbcDsn...}
Manifest   1.0.0.0    WindowsDeveloperLicense             {Get-WindowsDeveloperLicense, Show-WindowsDeveloperLicense...
Script     1.0        WindowsErrorReporting               {Enable-WindowsErrorReporting, Disable-WindowsErrorReporti...
Manifest   1.0.0.0    WindowsSearch                       {Get-WindowsSearchSetting, Set-WindowsSearchSetting}
Run the script without admin rights

Need to set the Execution Policy using the below command.
Set-ExecutionPolicy unrestricted CurrentUser


See Also