diff --git a/pandora_agents/win32/ChangeLog b/pandora_agents/win32/ChangeLog
index da30b06a7e..9c7b848b72 100644
--- a/pandora_agents/win32/ChangeLog
+++ b/pandora_agents/win32/ChangeLog
@@ -1,3 +1,15 @@
+2006-11-24  Esteban Sánchez  <estebans@artica.es>
+
+	* pandora_strutils.h, pandora_strutils.cc: Added strtoulong() to
+	convert a string into a unsigned long integer.
+
+	* wmi/pandora_wmi.h, pandora_wmi.cc: Modified getDisgkFreeSpace() to
+	return a unsigned long integer. Used srttoulong() to transform the
+	free disk into a log instead of an integer, that caused a negative
+	value of free disk space when the amount was in the order of GB.
+
+	* bin/PandoraAgent.exe: Updated to new commit.
+
 2006-11-21  Esteban Sánchez  <estebans@artica.es>
 
 	* pandora_windows_service.cc: Changed the debug option of the
diff --git a/pandora_agents/win32/bin/PandoraAgent.exe b/pandora_agents/win32/bin/PandoraAgent.exe
index d0399fcf47..0fcd885fcb 100755
Binary files a/pandora_agents/win32/bin/PandoraAgent.exe and b/pandora_agents/win32/bin/PandoraAgent.exe differ
diff --git a/pandora_agents/win32/pandora_strutils.cc b/pandora_agents/win32/pandora_strutils.cc
index b401de9280..95a2c585b0 100644
--- a/pandora_agents/win32/pandora_strutils.cc
+++ b/pandora_agents/win32/pandora_strutils.cc
@@ -119,6 +119,28 @@ Pandora_Strutils::strtoint (const string str) {
         return result;
 }
 
+/** 
+ * Tranform a string into a long integer.
+ * 
+ * @param str String to convert.
+ * 
+ * @return The long integer value of the string.
+ *
+ * @exception Invalid_Conversion throwed if the string has non-
+ *            decimal values.
+ */
+unsigned long
+Pandora_Strutils::strtoulong (const string str) {
+        unsigned long result;
+
+        if (! std::sscanf (str.c_str (), "%uld", &result)) {
+                throw Invalid_Conversion ();
+        }
+	printf ("%s - %u\n", str.c_str (), result);
+
+        return result;
+}
+
 /** 
  * Replace every occurence of a pattern in a string with other substring.
  * 
diff --git a/pandora_agents/win32/pandora_strutils.h b/pandora_agents/win32/pandora_strutils.h
index 79e2c73cc2..98e8dc83b6 100644
--- a/pandora_agents/win32/pandora_strutils.h
+++ b/pandora_agents/win32/pandora_strutils.h
@@ -41,15 +41,16 @@ namespace Pandora_Strutils {
 	 */
         class Invalid_Conversion : Pandora_Strutils::String_Exception {};
 	
-        string trim        (const string str);
+        string        trim        (const string str);
 
-        string inttostr    (const int i);
-        string longtostr   (const long i);
-        string longtohex   (const long i);
+        string        inttostr    (const int i);
+        string        longtostr   (const long i);
+        string        longtohex   (const long i);
         
-        int    strtoint    (const string str);
+        int           strtoint    (const string str);
+	unsigned long strtoulong  (const string str);
         
-        string strreplace  (string in, string pattern, string rep);
+        string        strreplace  (string in, string pattern, string rep);
 
         void
         stringtok (list<string> &l, string const &s,
diff --git a/pandora_agents/win32/windows/pandora_wmi.cc b/pandora_agents/win32/windows/pandora_wmi.cc
index bb53e0940a..bd986fb8cb 100644
--- a/pandora_agents/win32/windows/pandora_wmi.cc
+++ b/pandora_agents/win32/windows/pandora_wmi.cc
@@ -153,12 +153,12 @@ Pandora_Wmi::isServiceRunning (string service_name) {
  * @exception Pandora_Wmi_Exception Throwd if an error occured when reading
  *            from WMI database.
  */
-long
+unsigned long
 Pandora_Wmi::getDiskFreeSpace (string disk_id) {
 	CDhInitialize init;
 	CDispPtr      wmi_svc, quickfixes;
 	string        id, space_str;
-	int           space;
+	unsigned long space;
 	
         struct QFix {
 		CDhStringA id, free_space;
@@ -185,7 +185,7 @@ Pandora_Wmi::getDiskFreeSpace (string disk_id) {
 				space_str = fix.free_space;
 				
 				try {
-					space = Pandora_Strutils::strtoint (space_str);
+					space = Pandora_Strutils::strtoulong (space_str);
 				} catch (Pandora_Exception e) {
 					throw Pandora_Wmi_Exception ();
 				}
diff --git a/pandora_agents/win32/windows/pandora_wmi.h b/pandora_agents/win32/windows/pandora_wmi.h
index 8700715919..f4b43cf51c 100644
--- a/pandora_agents/win32/windows/pandora_wmi.h
+++ b/pandora_agents/win32/windows/pandora_wmi.h
@@ -38,15 +38,15 @@ namespace Pandora_Wmi {
 	 */
         class Pandora_Wmi_Exception : public Pandora_Exception { };
 	
-        int    isProcessRunning      (string process_name);
-	int    isServiceRunning      (string service_name);
-	long   getDiskFreeSpace      (string disk_id);
-	int    getCpuUsagePercentage (int cpu_id);
-	long   getFreememory         ();
-	string getOSName             ();
-        string getOSVersion          ();
-        string getOSBuild            ();
-        string getSystemName         ();
+        int           isProcessRunning      (string process_name);
+	int           isServiceRunning      (string service_name);
+	unsigned long getDiskFreeSpace      (string disk_id);
+	int           getCpuUsagePercentage (int cpu_id);
+	long          getFreememory         ();
+	string        getOSName             ();
+        string        getOSVersion          ();
+        string        getOSBuild            ();
+        string        getSystemName         ();
 };
 
 #endif