How to run a PowerShell script

In case you want to run a PowerShell script with Windows Task Scheduler, please follow the steps below:

1. Create a task

2. Set `Program/Script` to `Powershell.exe`

3. Set `Arguments` to `-File "C:\xxx.ps1"`

It's from another answer, *https://stackoverflow.com/questions/23953926/how-to-execute-a-powershell-script-automatically-using-windows-task-scheduler/23954618#23954618*.

Use the `-File` parameter in front of the filename. The quotes make PowerShell think it is a string of commands.

If you are on PowerShell 2.0, use PowerShell.exe's `-File` parameter to invoke a script from another environment, like cmd.exe. For example:

Powershell.exe -File C:\my_path\yada_yada\run_import_script.ps1

You can run from cmd like this:
```
type "script_path" | powershell.exe -c -

With the appropriate execution policy, you should just be able to call the file directly and Windows will associate it with PowerShell
```
C:\my_path\yada_yada\run_import_script.ps1
```

That does not do so well with arguments. The real answer to your question is that you are missing the `&` to say "execute this"
```
powershell.exe '& C:\my_path\yada_yada\run_import_script.ps1'
```

I've just found the method what Microsoft do when we right click on a `ps1` script and click on "Run with PowerShell" :

```
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" "-Command" "if((Get-ExecutionPolicy ) -ne 'AllSigned') { Set-ExecutionPolicy -Scope Process Bypass }; & 'C:\Users\USERNAME\Desktop\MYSCRIPT.ps1'"
```

Prerequisites:

- You need to be able to run PowerShell as an administrator
- You need to set your PowerShell execution policy to a permissive value or be able to bypass it

Steps:

1. Launch Windows PowerShell as an Administrator, and wait for the `PS>` prompt to appear
2. Navigate within PowerShell to the directory where the script lives:

PS> cd C:\my_path\yada_yada\ (enter)

3. Execute the script:

PS> .\run_import_script.ps1 (enter)

Or: you can run the PowerShell script from the Command Prompt (`cmd.exe`) like this:

powershell -noexit "& ""C:\my_path\yada_yada\run_import_script.ps1""" (enter)

according to [*Invoking a PowerShell script from cmd.exe (or Start | Run)*][1] by Kirk Munro.

Or you could even [run your PowerShell script asynchronously from your C# application][2].

[1]:

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[2]:

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1. Open PowerShell in administrator mode
2. Run: `set-executionpolicy unrestricted`
3. Open a regular PowerShell window and run your script.

I found this solution following the link that was given as part of the error message: *[About Execution Policies][1]*

Make sure to run `set-ExecutionPolicy default` once you're done, or you will be exposed to security risks.

[1]:

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