diff --git a/VC2008/Lua.vcproj b/VC2008/Lua.vcproj
index d3a28748e..0285e2ad3 100644
--- a/VC2008/Lua.vcproj
+++ b/VC2008/Lua.vcproj
@@ -41,7 +41,7 @@
 			<Tool
 				Name="VCCLCompilerTool"
 				Optimization="0"
-				PreprocessorDefinitions="WIN32;_DEBUG;_LIB"
+				PreprocessorDefinitions="WIN32;_DEBUG;_LIB;_CRT_SECURE_NO_WARNINGS"
 				MinimalRebuild="true"
 				BasicRuntimeChecks="3"
 				RuntimeLibrary="3"
@@ -104,7 +104,7 @@
 				Name="VCCLCompilerTool"
 				Optimization="2"
 				EnableIntrinsicFunctions="true"
-				PreprocessorDefinitions="WIN32;NDEBUG;_LIB"
+				PreprocessorDefinitions="WIN32;NDEBUG;_LIB;_CRT_SECURE_NO_WARNINGS"
 				RuntimeLibrary="2"
 				EnableFunctionLevelLinking="true"
 				UsePrecompiledHeader="0"
@@ -166,7 +166,7 @@
 				Name="VCCLCompilerTool"
 				Optimization="2"
 				EnableIntrinsicFunctions="true"
-				PreprocessorDefinitions="WIN32;NDEBUG;_LIB"
+				PreprocessorDefinitions="WIN32;NDEBUG;_LIB;_CRT_SECURE_NO_WARNINGS"
 				RuntimeLibrary="2"
 				EnableFunctionLevelLinking="true"
 				UsePrecompiledHeader="0"
diff --git a/VC2008/Squirrel3.vcproj b/VC2008/Squirrel3.vcproj
index 59ad61fd6..40f6c43de 100644
--- a/VC2008/Squirrel3.vcproj
+++ b/VC2008/Squirrel3.vcproj
@@ -43,7 +43,7 @@
 				Name="VCCLCompilerTool"
 				Optimization="0"
 				AdditionalIncludeDirectories="..\squirrel_3_0_1_stable\include"
-				PreprocessorDefinitions="WIN32;_DEBUG"
+				PreprocessorDefinitions="WIN32;_DEBUG;_CRT_SECURE_NO_WARNINGS"
 				RuntimeLibrary="3"
 				UsePrecompiledHeader="0"
 				WarningLevel="3"
@@ -104,7 +104,7 @@
 			<Tool
 				Name="VCCLCompilerTool"
 				AdditionalIncludeDirectories="../squirrel_3_0_1_stable/include"
-				PreprocessorDefinitions="WIN32;NDEBUG"
+				PreprocessorDefinitions="WIN32;NDEBUG;_CRT_SECURE_NO_WARNINGS"
 				RuntimeLibrary="2"
 				UsePrecompiledHeader="0"
 				WarningLevel="3"
diff --git a/VC2008/ToLua.vcproj b/VC2008/ToLua.vcproj
index 4b9491a75..e93458358 100644
--- a/VC2008/ToLua.vcproj
+++ b/VC2008/ToLua.vcproj
@@ -42,7 +42,7 @@
 				Name="VCCLCompilerTool"
 				Optimization="0"
 				AdditionalIncludeDirectories="../tolua++-1.0.93/include;../lua-5.1.4/src"
-				PreprocessorDefinitions="WIN32;_DEBUG;_LIB"
+				PreprocessorDefinitions="WIN32;_DEBUG;_LIB;_CRT_SECURE_NO_WARNINGS"
 				MinimalRebuild="true"
 				BasicRuntimeChecks="3"
 				RuntimeLibrary="3"
@@ -106,7 +106,7 @@
 				Optimization="2"
 				EnableIntrinsicFunctions="true"
 				AdditionalIncludeDirectories="../tolua++-1.0.93/include;../lua-5.1.4/src"
-				PreprocessorDefinitions="WIN32;NDEBUG;_LIB"
+				PreprocessorDefinitions="WIN32;NDEBUG;_LIB;_CRT_SECURE_NO_WARNINGS"
 				RuntimeLibrary="2"
 				EnableFunctionLevelLinking="true"
 				UsePrecompiledHeader="0"
@@ -169,7 +169,7 @@
 				Optimization="2"
 				EnableIntrinsicFunctions="true"
 				AdditionalIncludeDirectories="../tolua++-1.0.93/include;../lua-5.1.4/src"
-				PreprocessorDefinitions="WIN32;NDEBUG;_LIB"
+				PreprocessorDefinitions="WIN32;NDEBUG;_LIB;_CRT_SECURE_NO_WARNINGS"
 				RuntimeLibrary="2"
 				EnableFunctionLevelLinking="true"
 				UsePrecompiledHeader="0"
diff --git a/VC2008/zlib.vcproj b/VC2008/zlib.vcproj
index 95612b693..697038481 100644
--- a/VC2008/zlib.vcproj
+++ b/VC2008/zlib.vcproj
@@ -41,13 +41,14 @@
 			<Tool
 				Name="VCCLCompilerTool"
 				Optimization="0"
-				PreprocessorDefinitions="WIN32;_DEBUG;_LIB"
+				PreprocessorDefinitions="WIN32;_DEBUG;_LIB;_CRT_SECURE_NO_WARNINGS"
 				MinimalRebuild="true"
 				BasicRuntimeChecks="3"
 				RuntimeLibrary="3"
 				UsePrecompiledHeader="0"
 				WarningLevel="3"
 				DebugInformationFormat="4"
+				DisableSpecificWarnings="4996"
 			/>
 			<Tool
 				Name="VCManagedResourceCompilerTool"
@@ -104,12 +105,13 @@
 				Name="VCCLCompilerTool"
 				Optimization="2"
 				EnableIntrinsicFunctions="true"
-				PreprocessorDefinitions="WIN32;NDEBUG;_LIB"
+				PreprocessorDefinitions="WIN32;NDEBUG;_LIB;_CRT_SECURE_NO_WARNINGS"
 				RuntimeLibrary="2"
 				EnableFunctionLevelLinking="true"
 				UsePrecompiledHeader="0"
 				WarningLevel="3"
 				DebugInformationFormat="3"
+				DisableSpecificWarnings="4996"
 			/>
 			<Tool
 				Name="VCManagedResourceCompilerTool"
@@ -166,12 +168,13 @@
 				Name="VCCLCompilerTool"
 				Optimization="2"
 				EnableIntrinsicFunctions="true"
-				PreprocessorDefinitions="WIN32;NDEBUG;_LIB"
+				PreprocessorDefinitions="WIN32;NDEBUG;_LIB;_CRT_SECURE_NO_WARNINGS"
 				RuntimeLibrary="2"
 				EnableFunctionLevelLinking="true"
 				UsePrecompiledHeader="0"
 				WarningLevel="3"
 				DebugInformationFormat="3"
+				DisableSpecificWarnings="4996"
 			/>
 			<Tool
 				Name="VCManagedResourceCompilerTool"
diff --git a/source/md5/md5.cpp b/source/md5/md5.cpp
index 39337da5d..ddbd1a381 100644
--- a/source/md5/md5.cpp
+++ b/source/md5/md5.cpp
@@ -35,6 +35,8 @@ documentation and/or software.
 /* interface header */
 #include "md5.h"
 
+// _X 2012_07_15: disable MSVC warnings on "insecure" functions, such as sprintf() - we know they're being used securely here
+#define _CRT_SECURE_NO_WARNINGS