How to create a service in powershell to execute .exe?

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Windows

PowerShell

service

I have powershell script. I need to run it as a service. I try this way to make it as a service.

What I have tried:

Start-Process -FilePath C:\Users\xx\Downloads\nssm-2.24\win32\nssm.exe -ArgumentList 'install AgentService "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" "-command "& { . D:\SERVICE\Script.ps1}"" ' -NoNewWindow

Then I open run.exe and type services.msc. The service exist. And I try to start it. It show the status is running.

But I see the powershell script is not running. Because in my powershell script I use infinity loop to do some process, like copy and rename file. But It does not work. Anyone can give me idea plese. Thank you.