When I
using (var process = new Process
{
    StartInfo = new ProcessStartInfo
    {
         FileName = "powercfg.exe",
         Arguments = "-energy",
         RedirectStandardOutput = true,
         UseShellExecute = false,
    }
})
{
    process.Start();
    process.WaitForExit();
}
It outputs:
A biblioteca de Diagnóstico de Eficiência de Consumo de Energia (energy.dll) não pôde ser carregada.
Translated to English:
The Energy Consumption Efficiency Diagnostic library (energy.dll) couldn't be loaded.
Even when running as admin.