From 04140081cef8c2cb05d743fd8a168049ab9a36d2 Mon Sep 17 00:00:00 2001
From: Travis Nickles <nickles.travis@gmail.com>
Date: Wed, 18 Jul 2018 00:56:05 -0500
Subject: [PATCH] Fixed problem when registry key does not exist

---
 DS4Windows/DS4Control/ControlService.cs | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/DS4Windows/DS4Control/ControlService.cs b/DS4Windows/DS4Control/ControlService.cs
index 8c6d7fc..2fddee8 100644
--- a/DS4Windows/DS4Control/ControlService.cs
+++ b/DS4Windows/DS4Control/ControlService.cs
@@ -87,7 +87,16 @@ namespace DS4Windows
         public void ScanPurgeHidGuard()
         {
             RegistryKey tempkey = Registry.LocalMachine.OpenSubKey(@"SYSTEM\CurrentControlSet\Services\HidGuardian\Parameters\Whitelist");
-            string[] subkeys = tempkey.GetSubKeyNames();
+            string[] subkeys = null;
+            if (tempkey != null)
+            {
+                subkeys = tempkey.GetSubKeyNames();
+            }
+            else
+            {
+                subkeys = new string[0];
+            }
+
             bool processExists = false;
             for (int ind = 0, arlen = subkeys.Length; ind < arlen; ind++)
             {