diff --git a/samples/traceapi/trcapi.cpp b/samples/traceapi/trcapi.cpp
index e7b7240..76c908b 100644
--- a/samples/traceapi/trcapi.cpp
+++ b/samples/traceapi/trcapi.cpp
@@ -7,7 +7,7 @@
 //  Copyright (c) Microsoft Corporation.  All rights reserved.
 //
 #undef WIN32_LEAN_AND_MEAN
-#define _WIN32_WINNT        0x400
+#define _WIN32_WINNT        0x0501
 #define WIN32
 #define NT
 #define _WINSOCK_DEPRECATED_NO_WARNINGS
diff --git a/samples/tracebld/trcbld.cpp b/samples/tracebld/trcbld.cpp
index 5392f90..b246da3 100644
--- a/samples/tracebld/trcbld.cpp
+++ b/samples/tracebld/trcbld.cpp
@@ -7,7 +7,7 @@
 //  Copyright (c) Microsoft Corporation.  All rights reserved.
 //
 
-#define _WIN32_WINNT        0x0500
+#define _WIN32_WINNT        0x0501
 #define WIN32
 #define NT
 
diff --git a/samples/tracelnk/trclnk.cpp b/samples/tracelnk/trclnk.cpp
index 75cbfe2..e7b3ed9 100644
--- a/samples/tracelnk/trclnk.cpp
+++ b/samples/tracelnk/trclnk.cpp
@@ -6,7 +6,7 @@
 //
 //  Copyright (c) Microsoft Corporation.  All rights reserved.
 //
-#define _WIN32_WINNT        0x0400
+#define _WIN32_WINNT        0x0501
 #define WIN32
 #define NT
 
diff --git a/samples/tracemem/trcmem.cpp b/samples/tracemem/trcmem.cpp
index 85f72b9..3cf7f62 100644
--- a/samples/tracemem/trcmem.cpp
+++ b/samples/tracemem/trcmem.cpp
@@ -6,7 +6,7 @@
 //
 //  Copyright (c) Microsoft Corporation.  All rights reserved.
 //
-#define _WIN32_WINNT        0x0400
+#define _WIN32_WINNT        0x0501
 #define WIN32
 #define NT
 
diff --git a/samples/tracereg/trcreg.cpp b/samples/tracereg/trcreg.cpp
index 7e1b780..94327ce 100644
--- a/samples/tracereg/trcreg.cpp
+++ b/samples/tracereg/trcreg.cpp
@@ -6,7 +6,7 @@
 //
 //  Copyright (c) Microsoft Corporation.  All rights reserved.
 //
-#define _WIN32_WINNT        0x0400
+#define _WIN32_WINNT        0x0501
 #define WIN32
 #define NT
 
diff --git a/samples/traceser/trcser.cpp b/samples/traceser/trcser.cpp
index b696fe6..20adab3 100644
--- a/samples/traceser/trcser.cpp
+++ b/samples/traceser/trcser.cpp
@@ -6,7 +6,7 @@
 //
 //  Copyright (c) Microsoft Corporation.  All rights reserved.
 //
-#define _WIN32_WINNT        0x0400
+#define _WIN32_WINNT        0x0501
 #define WIN32
 #define NT
 
diff --git a/samples/tracessl/trcssl.cpp b/samples/tracessl/trcssl.cpp
index ffc4439..f27ce61 100644
--- a/samples/tracessl/trcssl.cpp
+++ b/samples/tracessl/trcssl.cpp
@@ -6,7 +6,7 @@
 //
 //  Copyright (c) Microsoft Corporation.  All rights reserved.
 //
-#define _WIN32_WINNT        0x0400
+#define _WIN32_WINNT        0x0501
 #define WIN32
 #define NT
 #define SECURITY_WIN32
diff --git a/samples/tracetcp/trctcp.cpp b/samples/tracetcp/trctcp.cpp
index 9f2a879..761049d 100644
--- a/samples/tracetcp/trctcp.cpp
+++ b/samples/tracetcp/trctcp.cpp
@@ -6,7 +6,7 @@
 //
 //  Copyright (c) Microsoft Corporation.  All rights reserved.
 //
-#define _WIN32_WINNT        0x0400
+#define _WIN32_WINNT        0x0501
 #define WIN32
 #define NT
 #define _WINSOCK_DEPRECATED_NO_WARNINGS