Introduction: Automate Like a Pro with PowerShell

Updated on June 17, 2025, by ITarian

Ever wished you could automate routine IT tasks with a single line of code? Whether you’re an IT manager deploying updates, or a security analyst scanning systems, knowing how to run PowerShell script can save hours of work and reduce human error.

In this guide, you’ll learn various methods to execute PowerShell scripts, including via the PowerShell command line, the PowerShell ISE, and even through scheduled tasks. We’ll also address permissions, execution policies, and best practices for secure automation.

What is PowerShell and Why Use It?

PowerShell is Microsoft’s powerful command-line shell and scripting language designed for task automation and configuration management. It’s built on .NET and available across Windows, Linux, and macOS.

Why it matters:

Enables automation of repetitive tasks
Facilitates remote management and scripting
Used in cybersecurity for forensics and threat hunting
Extensible through modules and APIs

Pre-Requisites: Before You Run a PowerShell Script

Before diving in, make sure:

You have PowerShell installed (Windows comes with it, Linux/macOS users can install via package managers)
You know the location of your script (e.g., C:\scripts\myscript.ps1)
You understand the system’s execution policy, which may block scripts by default

Check current policy:

Get-ExecutionPolicy

Change it if needed:

Set-ExecutionPolicy RemoteSigned -Scope CurrentUser

⚠️ Always review and understand a script before running it. Avoid lowering execution policy globally on production machines.

Method 1: Run PowerShell Script from PowerShell Console

To execute PowerShell script directly from the terminal:

& “C:\scripts\myscript.ps1”

Or use the dot sourcing method:

. “C:\scripts\myscript.ps1”

If you get permission errors, double-check the execution policy or prepend with Start-Process:

Start-Process powershell -ArgumentList “-File ‘C:\scripts\myscript.ps1′”

Method 2: Run Script in PowerShell ISE

The PowerShell ISE (Integrated Scripting Environment) is perfect for beginners and script debugging.

Steps:

Open PowerShell ISE from the Start menu
Load your script file: File > Open
Press F5 to run it

ISE provides syntax highlighting, breakpoints, and a command pane—great for testing small changes quickly.

Method 3: Use Task Scheduler to Run Scripts Automatically

For automation tasks, schedule your script with Windows Task Scheduler:

Open Task Scheduler
Create a new task
In Action, select “Start a program”
Program/script: powershell.exe
Add arguments: -ExecutionPolicy Bypass -File “C:\scripts\myscript.ps1”

Useful for backups, log rotations, or nightly scans.

Method 4: Running Scripts Remotely

You can run scripts on remote computers using:

Invoke-Command -ComputerName Server01 -FilePath “C:\scripts\myscript.ps1”

Make sure remoting is enabled:

Enable-PSRemoting -Force

This is extremely useful for managing multiple systems from a central console.

Best Practices When Running PowerShell Scripts

Always test scripts in a safe environment first
Use Write-Output and Write-Verbose for transparency
Sign scripts if you plan to use AllSigned policy
Avoid using ExecutionPolicy Unrestricted unless in a sandbox
Monitor script execution using logs or verbose output

PowerShell Security Tips for Enterprises

Restrict access to the scripting environment using Group Policy
Maintain version control (e.g., Git) for all scripts
Use code signing certificates to ensure authenticity
Monitor with tools like Defender for Endpoint, which detects suspicious script activity
Review scripts for hardcoded credentials or insecure commands

Final Thoughts: Automate with Confidence

Learning how to run PowerShell script unlocks a world of automation, security, and efficiency. Whether you’re managing hundreds of endpoints or cleaning up files weekly, PowerShell has the power and flexibility to get it done.

Ready to scale your automation securely? Try Itarian’s endpoint protection and automation tools and take control of your infrastructure.