PwoerShell is not digitally signed. The script will not execute on the system. Please see "get-help about_signing" for more details

In PowerShell, use Set-ExecutionPolicy to change the status

• Restricted – No scripts can be run. Windows PowerShell can be used only in interactive mode.
• AllSigned – Only scripts signed by a trusted publisher can be run.
• RemoteSigned – Downloaded scripts must be signed by a trusted publisher before they can be run.
• Unrestricted – No restrictions; all Windows PowerShell scripts can be run.

Example: Set-ExecutionPolicy RemoteSigned