Get error saying psft-dpk-setup.ps1 is not digitally signed from powershell

Seeing the following:

PS \Download\HCM-920-UPD-016-WIN_1of10\setup> .\psft-dpk-setup.ps1 -env_type fulltier -deploy_only

.\psft-dpk-setup.ps1 : File \Download\HCM-920-UPD-016-WIN_1of10\setup\psft-dpk-setup.ps1 cannot be loaded. The file

\Download\HCM-920-UPD-016-WIN_1of10\setup\psft-dpk-setup.ps1 is not digitally signed. You cannot run this script on

the current system. For more information about running scripts and setting execution policy, see

about_Execution_Policies at http://go.microsoft.com/fwlink/?LinkID=135170.

At line:1 char:1

+ .\psft-dpk-setup.ps1 -env_type fulltier -deploy_only

+ ~~~~~~~~~~~~~~~~~~~~

    + CategoryInfo          : SecurityError: (:) [], PSSecurityException

    + FullyQualifiedErrorId : UnauthorizedAccess