PowerShell script will not start due to execution policy settings

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Krishna Posted: 10-04-2009 2:34 PM

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When you try to execute a PowerShell script the following error occurs:

File C:\scripts\myscript.ps1 cannot be loaded because the execution of scripts is disabled on this system. Please see ” get-help about_signing” for more details.

At line:1 char:23

+ c:\scripts\myscript.ps1 <<<<

CAUSE

By default the PowerShell execution policy is set to restricted, which does not allow the PowerShell Scripts to be run. There are 4 possible execution policies in PowerShell:

• Restricted – the default setting, doesn’t allow any scripts to run.
• AllSigned – only runs scripts which are signed by a trusted digital certificate
• RemoteSigned – runs local scripts without requiring them to be trusted. Scripts downloaded from the Internet  must be trusted before they can run.
• Unrestricted  - allows all scripts to run, even untrusted ones.

SOLUTION:

Use the Set-ExecutionPolicy command to “unlock” you work environment. For example if you are using a lab or learning environment you can issue the following command :

Set-ExecutionPolicy Unrestricted

IMPORTANT: This setting should not be used in a production environment because it could potentially allow scripts downloaded from internet or planted by viruses to be executed.  For a production use AllSigned or eventually Remote Signed policies

http://smtpport25.wordpress.com/2009/10/04/powershell-script-will-not-start-due-to-execution-policy-settings/

Regards,
Krishna
http://smtpport25.wordpress.com