scripts disabled on this system

[Wirless]

powershell -ExecutionPolicy Bypass -File C:\1a\Publish-SteamAppManifests.ps1

[JohnMackYouTube05]

Run PowerShell as an administrator, and run the following command:

Set-ExecutionPolicy Unrestricted

Then follow the instructions, and type Y to allow unrestricted PowerShell script execution.
Finally, try running the script again.