PowerShell Config

Version

get-host | select-object Version	Get PowerShell version using get-host.
echo $PSVERSIONTABLE	Shows all version and build information.
$PSVersionTable.PSVersion	Get PowerShell version using $PSVersionTable.PSVersion.
powershell -command "$PSVersionTable.PSVersion"	Get PowerShell version in Command Prompt.

Queries the installed versions of PowerShell using Common Information Model (CIM) and filters based on the product name:

Get-CimInstance -ClassName Win32_Product -Filter "Name LIKE 'Microsoft PowerShell%'" | Select-Object -Property Name, Version

Retrieves the PowerShell version as part of the operating system information using CIM:

Get-CimInstance -ClassName Win32_OperatingSystem | Select-Object -Property PSVersion

Lists installed versions of PowerShell using (WMI):

wmic product where "Name like 'Microsoft PowerShell%'" get Name, Version 

Retrieves the PowerShell version as part of the operating system information using WMIC:

wmic os get PowerShellVersion

PowerShell Profiles

$PsHome	Stores the installation directory for PowerShell.
$Home	Stores the current user’s home directory.
$PROFILE	Stores the path to the current user's profile script.
ISE $profile	Opens the user's profile script in the Integrated Scripting Environment (ISE).
$PsHome\\Profile.ps1	Profile script for all users and all hosts.
$PsHome\\Microsoft.PowerShell_profile.ps1	Profile script for all users on the current host.
$Home\\[My]Documents\\Profile.ps1	Profile script for the current user and all hosts.
$Home\\[My]Documents\\WindowsPowerShell\\Profile.ps1	Profile script for the current user on the current host.
$profile | Get-Member -Type NoteProperty	Displays the profile values of Names, MemberType, and Paths.
$Profile | get-member -type noteproperty | ft -wrap	Displays the profile values with wrapped text.
$PROFILE | Get-Member -MemberType noteproperty | select name	Displays only the Names of profile properties.
Test-Path -Path $profile.currentUsercurrentHost	Checks if the profile for the current user and host exists.
Test-Path -Path $profile.currentUserAllHosts	Checks if the profile for the current user and all hosts exists.
Test-Path -Path $profile.AllUsersAllHosts	Checks if the profiles for all users and all hosts exist.
Test-Path -Path $profile.AllUserscurrentHost	Checks if the profiles for all users on the current host exist.
New-Item -ItemType File -Path $profile -Force	Creates a new profile script for the current user, ignoring errors.

Switch Versions

Switch to PSv7:

pwsh

PowerShell Execution Policy

Get-ExecutionPolicy -list	Lists all of the Scopes and ExecutionPolicies on the system.
Get-ExecutionPolicy	Gets the current user's ExecutionPolicy.
powershell.exe Get-ExecutionPolicy	Retrieves the current PowerShell execution policy using CMD.

Sets the ExecutionPolicy for the CurrentUser to Unrestricted:

Set-ExecutionPolicy -ExecutionPolicy Unrestricted -Scope CurrentUser 

Queries the registry for the execution policy setting:

reg query "HKLM\SOFTWARE\Microsoft\PowerShell\1\ShellIds\Microsoft.PowerShell" /v ExecutionPolicy

Retrieves the execution policy setting from the registry:

Get-ItemProperty -Path "HKLM:\SOFTWARE\Microsoft\PowerShell\1\ShellIds\Microsoft.PowerShell" -Name ExecutionPolicy

Generates an HTML report containing the Group Policy settings, including the PowerShell execution policy, and opens it in the default web browser:

gpresult /h result.html && start result.html

Notes

Restricted: No scripts are allowed to run, offering the highest security level. Useful for locked-down environments or when testing untrusted code.

AllSigned: Requires all scripts and configuration files, even those written locally, to be signed by a trusted publisher before execution. Provides strong security but requires additional setup for signing your own scripts.

RemoteSigned: Permits execution of scripts downloaded from the internet only if they are signed by a trusted publisher. Offers a balance between security and functionality, allowing some remote script execution.

Bypass: No restrictions are in place, allowing all scripts to run without warnings or prompts. Least secure option, use with caution only in trusted environments.

Default: Sets the execution policy to the default for your system, which is: Restricted for Windows client operating systems. RemoteSigned for Windows server operating systems.