diff --git a/All/setup.go b/All/setup.go
index c4bd56e..a42a37d 100644
--- a/All/setup.go
+++ b/All/setup.go
@@ -44,8 +44,8 @@ func main() {
 
   // Set server file path to 'file'
 	var file = "-Program '" + dir + "\\server.exe'"
-	//Create firewall rule
-	cmdinstance := exec.Command("powershell.exe", "-WindowStyle", "Hidden", "-Command", "New-NetFirewallRule", "-DisplayName", "'Go Web Server'", "-Direction", "Inbound", file, "-Action", "Allow")
+	//Create firewall rule if no firewall rule exists.
+	cmdinstance := exec.Command("powershell.exe", "-WindowStyle", "Hidden", "-Command", "$r", "=", "Get-NetFirewallRule", "-DisplayName", "'Go Web Server'", "2>", "$null;", "if", "($r)", "{write-host 'found rule';}", "else", "{New-NetFirewallRule", "-DisplayName", "'Go Web Server'", "-Direction", "Inbound", file, "-Action", "Allow}")
   cmdinstance.SysProcAttr = &syscall.SysProcAttr{HideWindow: true} // Make it silent.
 	cmdinstance2 := exec.Command("cmd", "/C", "start", "http://localhost:8100")
 	cmdinstance2.SysProcAttr = &syscall.SysProcAttr{HideWindow: true} // Make it silent.