Running PowerShell as another user, and launching a script

Question

I won't get into all the details of why I need this, but users must be able to launch PowerShell as a service account and when PowerShell loads it needs to run a script. I already can launch PowerShell with the stored credentials (stored as a secure string), but for the life of me I cannot get the script (located in $args) to run. I have tried a variety of things, and below is where I am currently. Any help would be greatly appreciated.

$user = "domain\service.account" 
$pwd1 = "big long huge string of characters"
$pwd = ($pwd1 | ConvertTo-SecureString)
$Credential = New-Object System.Management.Automation.PSCredential $user, $pwd
$args = "\\domain.local\location\location\location\Script\script.ps1"
Start-Process powershell.exe -Credential $Credential -ArgumentList ("-file $args")

Answer 1

You can open a new powershell window under a specified user credential like this:

start powershell -credential ""

Answer 2

I found this worked for me.

$username = 'user'
$password = 'password'

$securePassword = ConvertTo-SecureString $password -AsPlainText -Force
$credential = New-Object System.Management.Automation.PSCredential $username, $securePassword
Start-Process Notepad.exe -Credential $credential

Updated: changed to using single quotes to avoid special character issues noted by Paddy.

Answer 3

Here's also nice way to achieve this via UI.

0) Right click on PowerShell icon when on task bar

1) Shift + right click on Windows PowerShell

2) "Run as different user"

Answer 4

Try adding the RunAs option to your Start-Process

Start-Process powershell.exe -Credential $Credential -Verb RunAs -ArgumentList ("-file $args")

Answer 5

In windows server 2012 or 2016 you can search for Windows PowerShell and then "Pin to Start". After this you will see "Run as different user" option on a right click on the start page tiles.