Let’s start with running scripts from within Windows PowerShell itself. (Which, truth be told, is probably the most common way to run Windows PowerShell scripts.) Why do you get weird error messages when you try to run a script? That’s easy. The security settings built into Windows PowerShell include something called the “execution policy;” the execution policy determines how (or if) PowerShell runs scripts. By default, PowerShell’s execution policy is set to Restricted; that means that scripts - including those you write yourself - won’t run. Period.
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