$jobname = "temporary"
$script =  "-File 'C:\Users\test\Downloads.ps1'"
$action = New-ScheduledTaskAction –Execute "$pshome\powershell.exe" -Argument  "$script"

$trigger =New-ScheduledTaskTrigger  -Atlogon


$settings = New-ScheduledTaskSettingsSet -AllowStartIfOnBatteries -DontStopIfGoingOnBatteries -StartWhenAvailable -RunOnlyIfNetworkAvailable -DontStopOnIdleEnd
Register-ScheduledTask -TaskName $jobname -Action $action -Trigger $trigger -RunLevel Highest -User "test" -Password "password" -Settings $settings