Using Windows PowerShell Files

To use Windows PowerShell files, specify the full path to the PowerShell file in the filename parameter:

"filename": 
"C:\\Windows\\System32\\WindowsPowerShell\\v1.0\\powershell.exe",

Then specify your session script in the arguments parameter:

"arguments": "-File \"C:\\path\\to\\session\\script.ps1\"",

Finally, verify that the PowerShell Execution Policy allows your PowerShell file to run.