I'm learning PowerShell for work and I'm currently creating a script that prepares new machines by installing necessary software. The issue I'm running into is the execution policy prompt that pops up at the start of most installations, especially for .msi files. I've tried using 'Set-ExecutionPolicy -Scope Process -ExecutionPolicy Bypass' at the beginning of my script and also tried setting it for individual functions, but neither approach has worked. I still have to manually bypass the execution policy prompt. I considered using a GPO to allow domain admins to bypass the execution policy, but I'm not sure if the security risk is worth it. Is there a more effective way to handle this?
3 Answers
It sounds like you're setting the execution policy too late. Try setting it before you run your script with something like this: 'PowerShell -executionpolicy bypass -file yourScript.ps1'. This way, the execution policy is applied before your script starts, which should help avoid those prompts.
Your approach can vary depending on whether you've implemented a PKI for code signing. If you have, you could set an execution policy to only run signed scripts, which would eliminate unwanted prompts, provided the certificates are trusted. If not, a simple workaround is to create a batch file that calls PowerShell with the '-Executionpolicy bypass' parameter, which should run without prompts.
Using PowerShell 5.1 or 7.4 can affect how your script runs. Instead of using 'Set-ExecutionPolicy' within your script, which often doesn't work as expected due to timing issues, you can set the execution policy at runtime using '$env:PSExecutionPolicyPreference = 'Bypass''. This approach lets your commands and scripts run without the usual restrictions.
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