Use PowerShell for autostart task setup

setup_autostart.bat

@@ -26,13 +26,12 @@ if not exist "%LOG_DIR%" mkdir "%LOG_DIR%"
 
 REM Create a startup task. Run this file as Administrator.
 REM The task runs as SYSTEM, so it can start after reboot before desktop login.
-schtasks /Create ^
-    /TN "%TASK_NAME%" ^
-    /SC ONSTART ^
-    /RU SYSTEM ^
-    /RL HIGHEST ^
-    /TR "\"%RUNNER_BAT%\"" ^
-    /F
+powershell -NoProfile -ExecutionPolicy Bypass -Command ^
+    "$Action = New-ScheduledTaskAction -Execute 'cmd.exe' -Argument '/c ""%RUNNER_BAT%""';" ^
+    "$Trigger = New-ScheduledTaskTrigger -AtStartup;" ^
+    "$Principal = New-ScheduledTaskPrincipal -UserId 'SYSTEM' -RunLevel Highest;" ^
+    "$Settings = New-ScheduledTaskSettingsSet -StartWhenAvailable -MultipleInstances IgnoreNew;" ^
+    "Register-ScheduledTask -TaskName '%TASK_NAME%' -Action $Action -Trigger $Trigger -Principal $Principal -Settings $Settings -Force | Out-Null"
 
 if not "%ERRORLEVEL%"=="0" (
     echo.