PowerShell & Windows Settings KB

🎯 PowerShell Fundamentals

📘 Microsoft Docs
🔗 Get-Help docs 🔗 Get-Command docs 🔗 About Execution Policies

PowerShell is Microsoft's scripting and automation framework. It works with objects, making it easy to chain commands together.

Getting Help & Information

🔹

Get-Command

Lists all available commands.

🔹

Get-Command -Module $Module

Lists commands from a specific module.

🔹

Get-Help -Name $Command

Shows full help for a command.

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Get-Help -Name $Command -Parameter $Parameter

Shows help for a specific parameter.

🔹

Get-Command | Get-Member

Shows all properties and methods of an object. Alias: gm

🔹

$PSVersionTable

Shows current PowerShell version info.

🔹

Get-ExecutionPolicy -List

Shows execution policies for each scope.

🔹

Set-ExecutionPolicy -ExecutionPolicy $Policy -Scope $Scope

Sets the execution policy.

Note: RemoteSigned requires downloaded scripts to be signed. Unrestricted allows all scripts. Reset after use or scope to a single session.

📦 Variables & Data Types

📘 Microsoft Docs
🔗 About Variables 🔗 About Data Types

Variables use the $ prefix. PowerShell handles type conversion automatically in most cases.

Variable Declaration & Assignment

🔹

$variableName = value

Creates and assigns a variable. No prior declaration needed.

🔹

[datatype] $variableName = value

Creates a strongly typed variable.

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Get-Variable

Lists all variables in scope.

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New-Variable -Name $Name -Value $Value -Option ReadOnly

Creates a variable with optional attributes like ReadOnly.

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Remove-Variable -Name $Name

Deletes a variable. Use -Force for ReadOnly.

Data Types & Type Casting

Type	Description	Example
[int]	32-bit integer	`$num = 42`
[string]	Text string	`$name = "PowerShell"`
[bool]	Boolean (True/False)	`$flag = $true`
[array]	Collection of items	`$list = @(1,2,3)`
[hashtable]	Key-value pairs	`$map = @{key="value"}`
[float]/[double]	Floating-point numbers	`$pi = 3.14159`

🔹

$variable -is [type]  # Check if value is of a type

Checks if a variable matches a given type.

🔹

[int]$result = 5 / 3  # Forces integer result

Casts a value to a specific type.

String Interpolation

🔹

"Hello $name"  # Variable interpolation with double quotes

Double quotes expand variables. Single quotes treat everything as literal.

🔹

"{0} is {1}" -f $firstName, $lastName

Formats a string using indexed placeholders.

⚙️ Operators & Comparisons

📘 Microsoft Docs
🔗 About Operators 🔗 About Comparison Operators

Arithmetic Operators

Operator	Description	Example
+	Addition	`$a + $b`
-	Subtraction	`$a - $b`
*	Multiplication	`$a * $b`
/	Division (returns float)	`$a / $b`
%	Modulo (remainder)	`7 % 3 # Returns 1`

Comparison Operators

Operator	Description	Example
-eq	Equals	`$a -eq $b`
-ne	Not equals	`$a -ne $b`
-lt	Less than	`$a -lt 10`
-le	Less than or equal	`$a -le 10`
-gt	Greater than	`$a -gt 5`
-ge	Greater than or equal	`$a -ge 5`

Logical & String Operators

Operator	Description	Example
-and	Logical AND	`$true -and $false # $false`
-or	Logical OR	`$false -or $true # $true`
-not / !	Logical NOT	`-not $true # $false`
-like	Wildcard pattern match	`"test" -like "t*" # $true`
-match	Regular expression match	`"test" -match "^t" # $true`
-in	Check if in array	`1 -in @(1,2,3) # $true`
-contains	Array contains value	`@(1,2,3) -contains 2 # $true`

Assignment Operators

🔹

$a = 5           # Basic assignment
$a += 1          # Add and assign (increment)
$a -= 1          # Subtract and assign (decrement)
$a *= 2          # Multiply and assign
$a /= 2          # Divide and assign

Assignment operators allow shorthand for modifying variable values.

Ternary Operator (PowerShell 7+)

🔹

$result = $condition ? "yes" : "no"

The ternary operator provides a shorthand for if-else statements. Returns first value if true, second if false.

🔀 Control Flow & Logic

📘 Microsoft Docs
🔗 About If / ElseIf / Else 🔗 About Switch 🔗 About For / ForEach / While

If-ElseIf-Else Statements

🔹

if ($condition) {
    # Do something
} elseif ($otherCondition) {
    # Do something else
} else {
    # Default action
}

Runs code conditionally. Use -eq, -lt, -gt etc. for comparisons.

Switch Statements

🔹

switch ($value) {
    'option1' { "First choice"; break }
    'option2' { "Second choice"; break }
    default { "Default case" }
}

Matches a value against cases. Use break to stop fall-through.

🔹

switch -regex ($array) {
    '^[0-9]' { "Starts with number" }
    '[a-z]' { "Contains lowercase" }
}

Matches array elements using regex patterns.

For Loops

🔹

for ($i = 0; $i -lt 10; $i++) {
    Write-Output $i
}

Index-based loop with full control over start, end, and step.

ForEach Loops

🔹

foreach ($item in $collection) {
    Write-Output $item
}

Loops over each item in a collection.

🔹

$collection | ForEach-Object { Write-Output $_ }

Pipeline equivalent of foreach. Use $_ for the current item.

While Loops

🔹

while ($condition) {
    # Do something
    $count++
}

Loops while a condition is true. May not run if condition starts false.

🔹

do {
    # Do something (at least once)
} while ($condition)

Like while, but always runs at least once.

Flow Control Keywords

🔹

break      # Exit the current loop or switch
continue   # Skip to next iteration of loop
return     # Exit function and return value

Controls loop and function execution flow.

Parameter Attributes

Attribute	Description	Example
Mandatory=$true	Parameter is required	`[Parameter(Mandatory=$true)]`
ValueFromPipeline=$true	Accept input from pipeline	`[Parameter(ValueFromPipeline=$true)]`
ValidateSet	Restrict to specific values	`[ValidateSet('option1','option2')]`
ValidateRange	Restrict numeric range	`[ValidateRange(1,100)]`
Alias	Alternative parameter name	`[Alias('ComputerName')]`

📦 Modules & Imports

📘 Microsoft Docs
🔗 Import-Module docs 🔗 PowerShell Gallery 🔗 Find-Module docs

Module Management

🔹

Get-Module -ListAvailable

Lists all installed modules on the system.

🔹

Get-Module

Shows modules loaded in the current session.

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Import-Module -Name $Module

Loads a module into the current session.

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Remove-Module -Name $Module

Unloads a module from the session.

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Get-Command -Module $Module

Shows all commands in a module.

PowerShell Gallery (Package Management)

🔹

Find-Module -Name $Module

Searches PowerShell Gallery by name.

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Find-Module -Tag $Tag

Searches PowerShell Gallery by tag.

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Install-Module -Name $Module -Scope CurrentUser -Force

Installs a module. CurrentUser scope doesn't need admin.

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Install-Module -Name $Module -RequiredVersion $Version

Installs a specific module version.

📁 File System Operations

📘 Microsoft Docs
🔗 Get-ChildItem docs 🔗 About FileSystem Provider 🔗 Get-Content docs

Basic File Operations

🔹

Get-ChildItem -Path $Path

Lists files and folders at the given path. Alias: ls, dir

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Get-ChildItem -Path $Path -Recurse

Recursively lists all files and subfolders.

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New-Item -Path $Path -ItemType Directory

Creates a new folder.

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New-Item -Path $Path -ItemType File

Creates a new empty file.

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Remove-Item -Path $Path

Deletes a file or folder. Use -Force for read-only items.

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Remove-Item -Path $Path -Recurse

Deletes a folder and all its contents.

File Content Operations

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Get-Content -Path $Path

Reads a file's contents.

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Set-Content -Path $Path -Value $Content

Overwrites a file with new content.

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Add-Content -Path $Path -Value $Line

Appends to a file without overwriting.

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Copy-Item -Path $Source -Destination $Dest -Recurse

Copies a file or folder. Use -Recurse for folders.

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Move-Item -Path $Source -Destination $Dest

Moves or renames a file or folder.

📧 Exchange & Mailbox Management

📘 Microsoft Docs
🔗 Exchange Online PowerShell 🔗 Get-Mailbox docs 🔗 Add-MailboxPermission docs

Manage Exchange Online mailboxes and permissions. Requires the ExchangeOnlineManagement module.

Connection & Authentication

🔹

Import-Module ExchangeOnlineManagement

Loads the Exchange Online module.

🔹

Connect-ExchangeOnline -UserPrincipalName $UPN

Connects to Exchange Online.

🔹

$UserCredential = Get-Credential
Connect-ExchangeOnline -UserPrincipalName $UserCredential.UserName -ShowProgress $true

Connects using stored credentials with progress output.

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Disconnect-ExchangeOnline -Confirm:$false

Disconnects from Exchange Online.

Mailbox Information

🔹

Get-Mailbox -Identity $Identity | Select-Object DisplayName, RecipientType

Gets mailbox details for a user.

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Get-MailboxStatistics -Identity $Identity | Select-Object DisplayName, TotalItemSize

Returns the total mailbox size.

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Get-MailboxStatistics -Identity $Identity | Select-Object DisplayName, ArchiveStatus, ArchiveSize

Returns archive size and status.

Mailbox Permissions & Delegation

🔹

Add-MailboxPermission -Identity $Identity -User $Delegate -AccessRights FullAccess -InheritanceType All

Grants another user full access to a mailbox.

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Get-MailboxPermission -Identity $Identity

Shows who has access to a mailbox.

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Remove-MailboxPermission -Identity $Identity -User $Delegate -AccessRights FullAccess -Confirm:$false

Revokes a user's mailbox access.

Calendar & MailTip Configuration

🔹

Set-MailboxCalendarConfiguration -Identity $Identity -PublishEnabled $true -AddOrganizerToSubject $false

Updates calendar sharing settings.

🔹

Set-Mailbox -Identity $MailboxEmailAddress -MailTip $MailtipMessage

Sets a MailTip shown to senders.

Archive Management

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Set-Mailbox user@example.com -ArchiveQuota unlimited -ArchiveWarningQuota unlimited

Sets the archive quota to unlimited.

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Enable-Mailbox -Identity $Identity -Archive

Enables a user's archive mailbox.

☁️ OneDrive Management

📘 Microsoft Docs
🔗 OneDrive PowerShell overview 🔗 OneDrive sync troubleshooting

Commands for managing and troubleshooting the OneDrive client on Windows.

OneDrive Service & Process Management

Note: The OneDrive executable path changes depending on the Windows version and install type. If the path below fails, find the correct one via Task Manager → Details tab, right-click OneDrive.exe → Open file location.

🔹

Start-Process "$env:LOCALAPPDATA\Microsoft\OneDrive\OneDrive.exe" /reset

Resets OneDrive using the most common per-user install path. Works on most Windows 10/11 machines.

🔹

Start-Process "C:\Program Files (x86)\Microsoft OneDrive\onedrive.exe" /reset

Resets OneDrive (x86 install path — common on older or 32-bit installs).

🔹

taskkill /f /im OneDrive.exe

Force-kills OneDrive. Run before uninstalling.

OneDrive Configuration

🔹

Set-ItemProperty -Path "HKCU:\Software\Microsoft\OneDrive" -Name "UserUpn" -Value $UPN

Sets the OneDrive UPN in the registry.

OneDrive Troubleshooting

🔹

Get-ChildItem -Path $Path -Recurse | Where-Object { $_.FullName.Length -gt 260 }

Finds files with paths over 260 characters.

🔹

Start-Process "C:\Program Files (x86)\Microsoft OneDrive\onedrive.exe"

Starts the OneDrive application.

OneDrive Uninstallation

🔹

%systemroot%\SysWOW64\OneDriveSetup.exe /uninstall

Uninstalls OneDrive. Terminate OneDrive.exe first.

🌐 Networking & Connectivity

📘 Microsoft Docs
🔗 Test-NetConnection docs 🔗 Get-NetIPAddress docs 🔗 Get-NetAdapter docs

Cmdlets for IP configuration, adapter management, and connectivity testing.

IP Address Configuration

🔹

Get-NetIPAddress

Lists all IP addresses on the machine.

🔹

New-NetIPAddress -InterfaceAlias "Ethernet" -IPAddress 192.168.1.100 -PrefixLength 24

Assigns a new IP address.

🔹

Set-NetIPAddress -InterfaceAlias "Ethernet" -IPAddress 192.168.1.10 -PrefixLength 24

Updates an existing IP address.

🔹

Set-NetIPAddress -InterfaceAlias "Ethernet" -IPAddress 192.168.1.10 -DefaultGateway 192.168.1.1

Sets IP address and default gateway.

Network Adapter Management

🔹

Get-NetAdapter

Lists all network adapters and their status.

🔹

Get-NetAdapter -Name "Ethernet" | Set-NetAdapter -Enabled $true

Enables or disables a network adapter.

Connectivity Testing

🔹

Test-NetConnection -ComputerName $Host

Pings a host and tests DNS resolution.

🔹

Test-NetConnection -ComputerName $Host -Port $Port

Tests connectivity to a host on a specific port.

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Test-NetConnection -ComputerName $Host -Port 443 -InformationLevel Detailed

Returns detailed diagnostics including routing and latency.

Wireless Diagnostics

🔹

wlanreport

Generates an HTML wireless diagnostic report.

Traceroute

🔹

Test-NetConnection -ComputerName $Host -TraceRoute

Traces each hop to a destination. PowerShell equivalent of tracert.

🔹

tracert $Host

Classic CMD traceroute — also runs inside PowerShell.

DNS Resolution

🔹

Resolve-DnsName -Name $Hostname

Resolves a DNS name to IP. PowerShell equivalent of nslookup.

🔹

Resolve-DnsName -Name $Hostname -Server $DnsServer

Queries a specific DNS server — useful for testing split DNS.

🔹

Clear-DnsClientCache

Flushes the local DNS cache. Equivalent of ipconfig /flushdns.

🔹

Get-DnsClientCache

Shows all currently cached DNS entries on the machine.

Firewall

🔹

Get-NetFirewallRule | Where-Object { $_.Enabled -eq 'True' }

Lists all enabled firewall rules.

🔹

New-NetFirewallRule -DisplayName $RuleName -Direction Inbound -Protocol TCP -LocalPort $Port -Action Allow

Creates an inbound firewall allow rule for a TCP port.

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Remove-NetFirewallRule -DisplayName $RuleName

Removes a firewall rule by display name.

⚡ Windows Power & Settings

📘 Microsoft Docs
🔗 powercfg command-line options 🔗 Power management in Windows 🔗 Sleep and hibernate overview

Commands for managing power plans, sleep, hibernate, and related Windows settings.

View & Switch Power Plans

🔹

powercfg /list

Lists all power plans and their GUIDs.

🔹

powercfg /getactivescheme

Shows the active power plan.

🔹

powercfg /setactive $SchemeGUID

Activates a power plan by GUID.

Plan	GUID
Balanced	`381b4222-f694-41f0-9685-ff5bb260df2e`
High Performance	`8c5e7fda-e8bf-4a96-9a85-a6e23a8c635c`
Power Saver	`a1841308-3541-4fab-bc81-f71556f20b4a`

🔹

powercfg -restoredefaultschemes

Restores default Windows power plans.

🔹

powercfg /export $PlanPath $SchemeGUID
powercfg /import $PlanPath

Exports a power plan to file; import on another machine.

Sleep, Hibernate & Timeout Settings

🔹

powercfg /hibernate off

Disables hibernate and removes hiberfil.sys.

🔹

powercfg /hibernate on

Re-enables hibernate. Required for Fast Startup.

🔹

powercfg /change standby-timeout-ac $minutes
powercfg /change standby-timeout-dc $minutes

Sets sleep timeout for both AC (plugged in) and battery.

🔹

powercfg /change monitor-timeout-ac $minutes
powercfg /change monitor-timeout-dc $minutes

Sets screen-off timeout for both AC and battery.

🔹

powercfg /change disk-timeout-ac $minutes
powercfg /change disk-timeout-dc $minutes

Sets disk spin-down timeout for both AC and battery.

🔹

powercfg /change hibernate-timeout-ac $minutes
powercfg /change hibernate-timeout-dc $minutes

Sets the delay before sleep transitions to hibernate.

Fast Startup & Shutdown

🔹

reg add "HKLM\SYSTEM\CurrentControlSet\Control\Session Manager\Power" /v HiberbootEnabled /t REG_DWORD /d 0 /f

Disables Fast Startup. Ensures a full power cycle on shutdown.

🔹

reg add "HKLM\SYSTEM\CurrentControlSet\Control\Session Manager\Power" /v HiberbootEnabled /t REG_DWORD /d 1 /f

Re-enables Fast Startup. Requires hibernate to be on.

🔹

reg query "HKLM\SYSTEM\CurrentControlSet\Control\Session Manager\Power" /v HiberbootEnabled

Checks Fast Startup state: 0x0 = off, 0x1 = on.

USB & NIC Power Management

🔹

powercfg /setacvalueindex SCHEME_CURRENT 2a737441-1930-4402-8d77-b2bebba308a3 48e6b7a6-50f5-4782-a5d4-53bb8f07e226 0 powercfg /setactive SCHEME_CURRENT

Disables USB selective suspend on AC power. Stops peripherals from dropping.

🔹

Get-NetAdapter -Name $Adapter | Set-NetAdapterPowerManagement -WakeOnMagicPacket Disabled -WakeOnPattern Disabled -SelectiveSuspend Disabled
powercfg /setactive SCHEME_CURRENT

Disables NIC power saving. Prevents RDP and Teams disconnects.

🔹

$nics = Get-NetAdapter | Where-Object {$_.Status -eq "Up"}
foreach ($nic in $nics) {
    Set-NetAdapterPowerManagement -Name $nic.Name -WakeOnMagicPacket Disabled -WakeOnPattern Disabled -ErrorAction SilentlyContinue
}
powercfg /setactive SCHEME_CURRENT

Disables Wake-on-LAN on all active NICs.

Screen Lock & Idle Settings

🔹

reg add "HKCU\Control Panel\Desktop" /v ScreenSaveTimeOut /t REG_SZ /d $Seconds /f

Sets screen saver idle timeout in seconds.

🔹

reg add "HKCU\Control Panel\Desktop" /v ScreenSaveActive /t REG_SZ /d 0 /f

Disables the screen saver.

🔹

powercfg /setacvalueindex SCHEME_CURRENT SUB_VIDEO VIDEOIDLE $Seconds
powercfg /setactive SCHEME_CURRENT

Sets display-off timeout.

🔹

reg add "HKLM\Software\Policies\Microsoft\Windows\Personalization" /v NoLockScreen /t REG_DWORD /d 1 /f

Hides the lock screen on sign-in and wake. Does not remove the password prompt.

🔹

powercfg /setacvalueindex SCHEME_CURRENT SUB_NONE CONSOLELOCK 0
powercfg /setactive SCHEME_CURRENT

Disables the password-on-wake requirement for AC power.

Windows Update & M365 Background Issues

🔹

reg add "HKLM\SOFTWARE\Policies\Microsoft\Windows\DeliveryOptimization" /v DODownloadMode /t REG_DWORD /d 0 /f

Disables Delivery Optimisation P2P bandwidth usage.

🔹

reg add "HKLM\SOFTWARE\Microsoft\WindowsUpdate\UX\Settings" /v ActiveHoursStart /t REG_DWORD /d $StartHour /f
reg add "HKLM\SOFTWARE\Microsoft\WindowsUpdate\UX\Settings" /v ActiveHoursEnd   /t REG_DWORD /d $EndHour   /f

Sets Windows Update active hours.

🔹

reg add "HKLM\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate\AU" /v NoAutoRebootWithLoggedOnUsers /t REG_DWORD /d 1 /f

Prevents automatic reboots while a user is logged in.

🔹

reg add "HKCU\Software\Microsoft\Windows\CurrentVersion\BackgroundAccessApplications\MSTeams_PackageID" /v Disabled /t REG_DWORD /d 0 /f
reg add "HKCU\Software\Microsoft\Windows\CurrentVersion\BackgroundAccessApplications\MSTeams_PackageID" /v DisabledByUser /t REG_DWORD /d 0 /f

Stops Battery Saver from suspending Teams, preventing missed calls.

🔹

Get-Process -Name OneDrive -ErrorAction SilentlyContinue | Select-Object Name, CPU, WorkingSet

Checks if OneDrive is running. High CPU may indicate a stuck sync.

🔹

Stop-Process -Name OneDrive -Force -ErrorAction SilentlyContinue
Start-Sleep -Seconds 3
Start-Process "C:\Users\username\AppData\Local\Microsoft\OneDrive\OneDrive.exe"

Restarts OneDrive to fix stuck sync.

Power Diagnostics & Reporting

🔹

powercfg /energy /output $Output

Runs a 60-second trace and outputs an HTML power diagnostics report.

🔹

powercfg /sleepstudy /output $Output

Generates a 3-day sleep history report.

🔹

powercfg /requests

Shows processes currently preventing sleep.

🔹

powercfg /waketimers

Lists wake timers that will wake the machine from sleep.

🔹

powercfg /lastwake

Shows what last woke the machine.

🔹

powercfg /devicequery wake_armed

Lists devices that are allowed to wake the system.

🔹

powercfg /batteryreport /output $Output

Generates a battery health report including design vs actual capacity.

🔐 RunAs & Credentials

📘 Microsoft Docs
🔗 Get-Credential docs 🔗 Invoke-Command docs 🔗 runas command docs

Run commands or open sessions as a different user. Useful for IT admins needing to execute privileged commands without logging off, or authenticate against remote systems interactively.

RunAs in CMD / PowerShell

🔹

runas /user:$Domain\$User powershell.exe

Opens a new PowerShell window as a different user. You are prompted for the password interactively.

🔹

runas /user:$Domain\$User /netonly powershell.exe

/netonly — runs the process locally as your current user but uses the alternate credentials for all network connections. Ideal for accessing remote resources (AD, Exchange, file shares) without a full session switch.

🔹

runas /user:$Domain\$User cmd.exe

Opens a CMD prompt as the specified user.

Storing Credentials in PowerShell

🔹

$Cred = Get-Credential

Prompts for a username and password and stores them as a PSCredential object. Pass $Cred into any cmdlet that accepts -Credential.

🔹

$Cred = Get-Credential -UserName $Username -Message "Enter admin credentials"

Pre-fills the username in the prompt. Useful in scripts where the account is known but a secure password entry is still required.

Start-Process As Another User

🔹

Start-Process powershell.exe -Credential $Cred -NoNewWindow

Launches PowerShell as the credential user. Combine with -ArgumentList to run a specific command.

🔹

Start-Process powershell.exe -Credential $Cred -ArgumentList "-Command $Command"

Runs a specific PowerShell command as another user in a new process.

Interactive Remote Session

🔹

Enter-PSSession -ComputerName $Computer -Credential $Cred

Opens a live interactive PowerShell session on a remote machine. Your prompt changes to the remote host — works like SSH for Windows.

🔹

Exit-PSSession

Exits the interactive remote session and returns to your local shell.

🔹

Invoke-Command -ComputerName $Computer -Credential $Cred -ScriptBlock { $Commands }

Runs commands on a remote machine non-interactively. Results are returned to your local session.

🔹

$Session = New-PSSession -ComputerName $Computer -Credential $Cred
Invoke-Command -Session $Session -ScriptBlock { $Commands }
Remove-PSSession $Session

Creates a persistent reusable session, runs commands against it, then cleans up. More efficient than repeated one-off Invoke-Command calls.

Note: WinRM must be enabled on the target machine for remote sessions. Run Enable-PSRemoting -Force on the remote machine as an administrator to enable it.

📜 PS1 Scripts Library

A collection of PowerShell scripts. Add your .ps1 files below with a short description of what each one does.

📂

Drop .ps1 files here to add them

You'll be prompted for a description and category tag

📄 Get-SystemInfo.ps1

Outputs OS version, CPU, RAM and disk info to the console.

# Get-SystemInfo.ps1
# Outputs basic system information

$os   = Get-CimInstance Win32_OperatingSystem
$cpu  = Get-CimInstance Win32_Processor
$disk = Get-PSDrive C

Write-Host "OS:   $($os.Caption) $($os.Version)"
Write-Host "CPU:  $($cpu.Name)"
Write-Host "RAM:  $([math]::Round($os.TotalVisibleMemorySize/1MB, 1)) GB"
Write-Host "Disk: $([math]::Round($disk.Used/1GB,1)) GB used of $([math]::Round(($disk.Used+$disk.Free)/1GB,1)) GB"

📋 Quick Navigation

🗝️ Legend & Notes

🎯 PowerShell Fundamentals 📄 MS Docs 📘 Microsoft Docs 🔗 Get-Help docs 🔗 Get-Command docs 🔗 About Execution Policies