C# Countdown for 1 Year

Question

Hi, is there any possibility to create a countdown for 1 year and disable login for windows form?

 

The countdown will not stop if the user logout the app or shutdown their PC.

int OrigTime = 1800;

private void button1_Click(object sender, EventArgs e)
   {
       Timer timeX = new Timer();
       timeX.Interval = 1800000;
       timeX.Tick += new EventHandler(timeX_Tick);
   }

private void timeX_Tick(object sender, EventArgs e)
   {
       OrigTime--;
       textBox1.Text = OrigTime/60 + ":" + ((OrigTime % 60) >= 10 ?  (OrigTime % 60).ToString() : "0" + OrigTime % 60);
   }

The code above is triggered when user click a button and will stop automatically.