diff -r 6b24e39f1b84 -r 0e46e3ca812a GUI/MainForm.cs
--- a/GUI/MainForm.cs	Tue Dec 30 21:04:54 2014 +0000
+++ b/GUI/MainForm.cs	Tue Dec 30 22:47:39 2014 +0000
@@ -536,7 +536,7 @@
         wmiProvider.Update();
 
 
-      if (logSensors.Value && delayCount >= 4)
+      if (logSensors != null && logSensors.Value && delayCount >= 4)
         logger.Log();
 
       if (delayCount < 4)