>In case you’re wondering why on earth your PowerShell scripts don’t run, its because scripting in Windows PowerShell is not enabled by default. Imagine your custom .NET assemblies being blocked until such time you register them on your global assembly cache (GAC). This is to make sure you don’t run just about any script on your system. This is normally referred to as the restricted execution policy. You’ll probably encounter something like this if it’s the first time you’ll run a PowerShell script

You can find out more about execution policy in Windows PowerShell by typing Get-Help Set-ExecutionPolicy on your PowerShell command window. You should also make sure that you have permissions to run scripts on your machine. Check either your local or your domain security policy to be sure. Plus, unlike VBScript where you can just double-click and run, PowerShell scripts don’t behave that way. You need to call PowerShell before running the script. This is to make sure you don’t accidentally run the script by just double-clicking. It does make sense especially if your machine get’s exploited by a virus or a worm.