cannot be loaded because running scripts is disabled on this system
Environment Setup
- Operating System: Windows
- IDE: VS Code
- Shell: PowerShell
- Framework: Angular 10.0.8
Problem Description
An error occurs preventing script execution, despite having configured environment variables correctly. The error message is similar to:
ng : Cannot load the file C:\Users\< username >\AppData\Roaming\npm\ng.ps1 because running scripts is disabled on this system.
For more information, see about_Execution_Policies at https://go.microsoft.com/fwlink/?LinkID=135170.
At line:1 char:1
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This indicates an issue with PowerShell’s execution policy preventing the ng command from running.
Unsuccessful Attempts
- Removing Read-Only Attribute from
C:\Users\< username >\AppData\Roaming\npm\ng.ps1
Attempting to remove the read-only attribute from the ng.ps1 file, or even the parent directory, does not resolve the issue. The file is often already not read-only, and changing this setting has no effect.
- Deleting and Reinstalling
ng.ps1
Deleting the ng.ps1 file and reinstalling the Angular CLI via npm install -g @angular/cli results in the file being recreated, but the same error persists upon execution. This confirms the issue is not with a corrupted file, but rather with the execution policy.
Solution
The problem lies in the PowerShell execution policy, which restricts the execution of scripts. The following command resolves this:
Set-ExecutionPolicy -ExecutionPolicy RemoteSigned -Scope CurrentUser
This command sets the execution policy to RemoteSigned for the current user. RemoteSigned allows execution of scripts that are downloaded from the internet and signed by a trusted publisher or scripts that are written locally. This policy scope limits the change to the current user, minimizing potential security risks.
After running this command, PowerShell will be able to execute the ng command and other Angular CLI commands. You might need to close and reopen your PowerShell session for the changes to take effect.
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