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Open PowerShell as an administrator.
Check the current execution policy by running Get-ExecutionPolicy. If needed, set it to RemoteSigned or AllSigned using Set-ExecutionPolicy -ExecutionPolicy RemoteSigned (requires admin privileges).
Obtain a code-signing certificate: Use a certificate from a trusted Certificate Authority (CA) for production. For testing, create a self-signed certificate using: New-SelfSignedCertificate -Type CodeSigning -Subject "CN=YourName" -CertStoreLocation Cert:\CurrentUser\My
Retrieve the certificate by running:
$cert = Get-ChildItem Cert:\CurrentUser\My | Where-Object {$_.Subject -like "*YourName*"}Copied!✕CopySign the script using the Set-AuthenticodeSignature cmdlet:
Set-AuthenticodeSignature -FilePath "C:\Path\To\YourScript.ps1" -Certificate $certCopied!✕CopyVerify the signature by running:
Get-AuthenticodeSignature -FilePath "C:\Path\To\YourScript.ps1"Copied!✕Copy(Optional) Add a timestamp for long-term validity:
about_Signing - PowerShell | Microsoft Learn
Sep 29, 2025 · Explains how to sign scripts so that they comply with the PowerShell execution policies.
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