Index: includes/polling/os/wmi.inc.php
===================================================================
--- includes/polling/os/wmi.inc.php	(revision 6449)
+++ includes/polling/os/wmi.inc.php	(working copy)
@@ -13,7 +13,7 @@
 
 $os = preg_replace("/(\(R\)|®|«|Â)/", "", $wmi['os']['Caption']);
 $os = str_replace("Microsoft Windows ", "", $os);
-$os .= " ". str_replace("Service Pack ", "SP", $wmi['os']['CSDVersion']);
+if ($wmi['os']['CSDVersion']) { $os .= " ". str_replace("Service Pack ", "SP", $wmi['os']['CSDVersion']); }
 $os .= " (".$wmi['os']['Version'].")";
 
 if ($device['os'] != $os)