diff --git a/agent/windows-setup-agent/SetupWizard.cs b/agent/windows-setup-agent/SetupWizard.cs
index 1b068fc3f..3b3b32b03 100644
--- a/agent/windows-setup-agent/SetupWizard.cs
+++ b/agent/windows-setup-agent/SetupWizard.cs
@@ -194,21 +194,21 @@ namespace Icinga
 				string master_host, master_port;
 				GetMasterHostPort(out master_host, out master_port);
 
-				args += " --master_host " + Convert.ToString(master_host).Trim()
-				    + "," + Convert.ToString(master_port).Trim();
+				args += " --master_host " + master_host.Trim()
+				    + "," + master_port.Trim();
 
 				foreach (ListViewItem lvi in lvwEndpoints.Items) {
-					args += " --endpoint " + Convert.ToString(lvi.SubItems[0].Text).Trim();
+					args += " --endpoint " + lvi.SubItems[0].Text.Trim();
 
 					if (lvi.SubItems.Count > 1) {
-						args += "," + Convert.ToString(lvi.SubItems[1].Text).Trim()
-						    + "," + Convert.ToString(lvi.SubItems[2].Text).Trim();
+						args += "," + lvi.SubItems[1].Text.Trim()
+						    + "," + lvi.SubItems[2].Text.Trim();
 					}
 				}
 			});
 
 			if (rdoListener.Checked)
-				args += " --listen ::," + Convert.ToString(txtListenerPort.Text).Trim();
+				args += " --listen ::," + txtListenerPort.Text.Trim();
 
 			if (chkAcceptConfig.Checked)
 				args += " --accept-config";
@@ -216,14 +216,14 @@ namespace Icinga
 			if (chkAcceptCommands.Checked)
 				args += " --accept-commands";
 
-			string ticket = Convert.ToString(txtTicket.Text).Trim();
+			string ticket = txtTicket.Text.Trim();
 
 			if (ticket.Length > 0)
 				args += " --ticket \"" + ticket + "\"";
 
 			args += " --trustedcert \"" + _TrustedFile + "\"";
-			args += " --cn \"" + Convert.ToString(txtInstanceName.Text).Trim() + "\"";
-			args += " --zone \"" + Convert.ToString(txtInstanceName.Text) + "\"";
+			args += " --cn \"" + txtInstanceName.Text.Trim() + "\"";
+			args += " --zone \"" + txtInstanceName.Text.Trim() + "\"";
 
 			if (!RunProcess(Program.Icinga2InstallDir + "\\sbin\\icinga2.exe",
 				"node setup" + args,
@@ -234,7 +234,7 @@ namespace Icinga
 
 			SetConfigureStatus(50, "Setting ACLs for the Icinga 2 directory...");
 
-			string serviceUser = Convert.ToString(txtUser.Text).Trim();
+			string serviceUser = txtUser.Text.Trim();
 
 			DirectoryInfo di = new DirectoryInfo(Program.Icinga2InstallDir);
 			DirectorySecurity ds = di.GetAccessControl();