diff --git a/ftk/src/ftk.h b/ftk/src/ftk.h
index 70f1cf8..ea6e29c 100644
--- a/ftk/src/ftk.h
+++ b/ftk/src/ftk.h
@@ -4697,10 +4697,10 @@
 	/// of memory blocks that are used for pool memory allocation.
 	typedef struct
 	{
-	FLMUINT			uiAllocBytes;			///< Total number of bytes requested from
-													///< GedPoolAlloc and GedPoolCalloc calls
-	FLMUINT			uiCount;					///< Number of frees and resets performed on 
-													///< the pool
+		FLMUINT			uiAllocBytes;			///< Total number of bytes requested from
+														///< GedPoolAlloc and GedPoolCalloc calls
+		FLMUINT			uiCount;					///< Number of frees and resets performed on 
+														///< the pool
 	} POOL_STATS;
 
 	class FLMEXP F_Pool : public F_Object
diff --git a/ftk/src/ftkmisc.cpp b/ftk/src/ftkmisc.cpp
index 0d2bfc4..e9ac16e 100644
--- a/ftk/src/ftkmisc.cpp
+++ b/ftk/src/ftkmisc.cpp
@@ -39,9 +39,9 @@ F_MUTEX 								F_FileHdl::m_hAsyncListMutex = F_MUTEX_NULL;
 F_FileAsyncClient *				F_FileHdl::m_pFirstAvailAsync = NULL;
 FLMUINT								F_FileHdl::m_uiAvailAsyncCount = 0;
 
-FSTATIC RCODE f_initRandomGenerator( void);
-
-FSTATIC void f_freeRandomGenerator( void);
+#ifdef FLM_WIN
+	SET_FILE_VALID_DATA_FUNC 	gv_SetFileValidDataFunc = NULL;
+#endif
 
 #ifdef FLM_AIX
 	#ifndef nsleep
@@ -52,6 +52,10 @@ FSTATIC void f_freeRandomGenerator( void);
 	#endif
 #endif
 
+FSTATIC RCODE f_initRandomGenerator( void);
+
+FSTATIC void f_freeRandomGenerator( void);
+
 /****************************************************************************
 Desc:
 ****************************************************************************/
@@ -203,13 +207,28 @@ RCODE FLMAPI ftkStartup( void)
 	setrlimit( RLIMIT_FSIZE, &rlim);
 #endif
 
+#if defined( FLM_WIN)
+	{
+		HINSTANCE		hLibrary; 
+	
+		// Get a handle to the DLL.  If the handle is valid, try to get the
+		// function address. 
+	 
+		if( (hLibrary = LoadLibrary( TEXT( "kernel32.dll"))) != NULL) 
+		{
+			gv_SetFileValidDataFunc = (SET_FILE_VALID_DATA_FUNC)GetProcAddress( 
+				hLibrary, TEXT( "SetFileValidData")); 
+			FreeLibrary( hLibrary);
+		}
+	}
+#endif
+
 	// Setup logger
 
 	if (RC_BAD( rc = f_loggerInit()))
 	{
 		goto Exit;
 	}
-	
 
 Exit:
 
diff --git a/ftk/src/ftksys.h b/ftk/src/ftksys.h
index 6bee0a1..9628f86 100644
--- a/ftk/src/ftksys.h
+++ b/ftk/src/ftksys.h
@@ -1302,5 +1302,11 @@
 	RCODE f_netwareRenameFile(
 		const char *		pOldFilePath,
 		const char *		pNewFilePath);
-	
+
+#if defined(FLM_WIN)
+	typedef WINBASEAPI BOOL (WINAPI * SET_FILE_VALID_DATA_FUNC) ( 
+		HANDLE				hFile,
+		LONGLONG				ValidDataLength);
+#endif
+
 #endif	// FTKSYS_H
diff --git a/ftk/src/ftkwin.cpp b/ftk/src/ftkwin.cpp
index 3126b2d..06c951e 100644
--- a/ftk/src/ftkwin.cpp
+++ b/ftk/src/ftkwin.cpp
@@ -27,7 +27,8 @@
 
 #if defined( FLM_WIN)
 
-extern FLMATOMIC					gv_openFiles;
+extern FLMATOMIC						gv_openFiles;
+extern SET_FILE_VALID_DATA_FUNC	gv_SetFileValidDataFunc;
 
 /****************************************************************************
 Desc:
@@ -193,23 +194,26 @@ RCODE F_FileHdl::openOrCreate(
 	// opened/created.  This will allow subsequent file extend operations to
 	// be done via calls to SetFileValidData().
 
-	if( OpenProcessToken( GetCurrentProcess(), 
-		TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY, &hToken))
+	if( gv_SetFileValidDataFunc)
 	{
-		bClosePrivToken = TRUE;
-		
-		if( LookupPrivilegeValue( NULL, SE_MANAGE_VOLUME_NAME, &luid))
+		if( OpenProcessToken( GetCurrentProcess(), 
+			TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY, &hToken))
 		{
-			ZeroMemory ( &tp, sizeof( tp));
+			bClosePrivToken = TRUE;
 			
-			tp.PrivilegeCount = 1;
-			tp.Privileges[0].Luid = luid;
-			tp.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED;
-			
-			if( AdjustTokenPrivileges( hToken, FALSE, &tp, 
-				sizeof( TOKEN_PRIVILEGES), &oldtp, &udTokenPrivSize))
+			if( LookupPrivilegeValue( NULL, SE_MANAGE_VOLUME_NAME, &luid))
 			{
-				bRestoreTokenPrivileges = TRUE;
+				ZeroMemory ( &tp, sizeof( tp));
+				
+				tp.PrivilegeCount = 1;
+				tp.Privileges[0].Luid = luid;
+				tp.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED;
+				
+				if( AdjustTokenPrivileges( hToken, FALSE, &tp, 
+					sizeof( TOKEN_PRIVILEGES), &oldtp, &udTokenPrivSize))
+				{
+					bRestoreTokenPrivileges = TRUE;
+				}
 			}
 		}
 	}
@@ -864,13 +868,14 @@ RCODE F_FileHdl::extendFile(
 		goto Exit;
 	}
 	
-	if( SetFileValidData( m_hFile, ui64NewFileSize))
+	if( gv_SetFileValidDataFunc)
 	{
-		// The call was successful.  We are done.
-
-		goto Exit;
+		if( (gv_SetFileValidDataFunc)( m_hFile, ui64NewFileSize))
+		{
+			goto Exit;
+		}
 	}
-	
+
 	// Determine the number of bytes to extend
 	
 	ui64TotalBytesToExtend = ui64NewFileSize - ui64FileSize;