diff --git a/props/version4/base/Release.props b/props/version4/base/Release.props
index 5c827fc3..793413ed 100644
--- a/props/version4/base/Release.props
+++ b/props/version4/base/Release.props
@@ -28,12 +28,6 @@
       <IntrinsicFunctions>true</IntrinsicFunctions>
       <OmitFramePointers>true</OmitFramePointers>
       <Optimization>MaxSpeed</Optimization>
-
-      <!-- SSE4/AVX2 (also AVX512) -->
-      <!--TODO: these should be integrated with the HAVE build options.-->
-      <!--<EnableEnhancedInstructionSet>StreamingSIMDExtensions2</EnableEnhancedInstructionSet>-->
-      <EnableEnhancedInstructionSet>AdvancedVectorExtensions2</EnableEnhancedInstructionSet>
-  
       <!-- Other. -->
       <DebugInformationFormat>ProgramDatabase</DebugInformationFormat>
       <StringPooling>true</StringPooling>
diff --git a/props/version4/import/libbitcoin-system.import.props b/props/version4/import/libbitcoin-system.import.props
index 374a352a..390dc003 100644
--- a/props/version4/import/libbitcoin-system.import.props
+++ b/props/version4/import/libbitcoin-system.import.props
@@ -10,6 +10,36 @@
   <ItemGroup Label="BuildOptionsExtension">
     <PropertyPageSchema Include="$(MSBuildThisFileDirectory)libbitcoin-system.import.xml" />
   </ItemGroup>
+  
+  <!-- Options -->
+
+  <!-- These create non-portability. -->
+  <!-- These will compile to the target regardless of the compiling platform. -->
+  <!-- That will result in a crash of test/executable execution if mismatched. -->
+  <PropertyGroup>
+    <Option-avx512>false</Option-avx512>
+    <Option-avx2>true</Option-avx2>
+    <Option-sse41>true</Option-sse41>
+    <Option-shani>false</Option-shani>
+    <Option-neon>false</Option-neon>
+  </PropertyGroup>
+  <ItemDefinitionGroup>
+    <ClCompile>
+      <!-- order matters -->
+      <EnableEnhancedInstructionSet Condition="'$(Option-avx2)'   == 'true'">AdvancedVectorExtensions2</EnableEnhancedInstructionSet>
+      <EnableEnhancedInstructionSet Condition="'$(Option-avx512)' == 'true'">AdvancedVectorExtensions512</EnableEnhancedInstructionSet>
+    </ClCompile>
+  </ItemDefinitionGroup>
+
+  <!-- Messages -->
+
+  <Target Name="OptionInfo" BeforeTargets="PrepareForBuild">
+    <Message Text="Option-avx512     : $(Option-avx512)" Importance="high"/>
+    <Message Text="Option-avx2       : $(Option-avx2)" Importance="high"/>
+    <Message Text="Option-sse41      : $(Option-sse41)" Importance="high"/>
+    <Message Text="Option-shani      : $(Option-shani)" Importance="high"/>
+    <Message Text="Option-neon       : $(Option-neon)" Importance="high"/>
+  </Target>  
 
   <!-- Linkage -->
 
@@ -18,11 +48,22 @@
       <AdditionalIncludeDirectories>$(ProjectDir)..\..\..\..\..\libbitcoin-system\include\;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
       <!-- WITH_ICU always defined in Visual Studio builds. -->
       <!-- NOMINMAX enables use of std::min/max without conflict. -->
-      <!-- BOOST_EXCEPTION_DISABLE must be set here to be captured by all includes. -->
       <!-- WIN32_LEAN_AND_MEAN avoids inclusion of certain headers, winsock.h conflicts with boost and protocol use of winsock2.h. -->
       <PreprocessorDefinitions>WITH_ICU;WIN32_LEAN_AND_MEAN;NOMINMAX;_WIN32_WINNT=0x0600;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <PreprocessorDefinitions Condition="'$(Linkage-libbitcoin-system)' == 'static' Or '$(Linkage-libbitcoin-system)' == 'ltcg'">BC_STATIC;%(PreprocessorDefinitions)</PreprocessorDefinitions>
     </ClCompile>
+    <ClCompile>
+      <!-- Enable use of CPU intrinsics. -->
+      <PreprocessorDefinitions Condition="'$(Option-avx512)' == 'true'">WITH_AVX512;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions Condition="'$(Option-avx2)'   == 'true'">WITH_AVX2;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions Condition="'$(Option-sse41)'  == 'true'">WITH_SSE41;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions Condition="'$(Option-shani)'  == 'true'">WITH_SHANI;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions Condition="'$(Option-neon)'   == 'true'">WITH_NEON;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+    </ClCompile>    
+    <Link>
+      <!-- 4099: warns about missing PDB files. -->
+      <AdditionalOptions>/ignore:4099 %(AdditionalOptions)</AdditionalOptions>
+    </Link>  
     <Link>
       <AdditionalDependencies Condition="'$(Linkage-libbitcoin-system)' != ''">libbitcoin-system.lib;%(AdditionalDependencies)</AdditionalDependencies>
     </Link>
diff --git a/props/version4/import/libbitcoin-system.import.xml b/props/version4/import/libbitcoin-system.import.xml
index 05d1d74a..e8bed3f7 100644
--- a/props/version4/import/libbitcoin-system.import.xml
+++ b/props/version4/import/libbitcoin-system.import.xml
@@ -14,4 +14,36 @@
       <EnumValue Name="ltcg" DisplayName="Static using link time compile generation (LTCG)" />
     </EnumProperty>
   </Rule>
+  <Rule Name="libbitcoin-system-options-uiextension" PageTemplate="tool" DisplayName="Bitcoin System Options" SwitchPrefix="/" Order="1">
+    <Rule.Categories>
+      <Category Name="avx512" DisplayName="avx512" />
+      <Category Name="avx2" DisplayName="avx2" />
+      <Category Name="sse41" DisplayName="sse41" />
+      <Category Name="shani" DisplayName="shani" />
+      <Category Name="neon" DisplayName="neon" />
+    </Rule.Categories>
+    <Rule.DataSource>
+      <DataSource Persistence="ProjectFile" ItemType="" />
+    </Rule.DataSource>
+    <EnumProperty Name="Option-avx512" DisplayName="Enable AVX512 Intrinsics" Description="Use AVX512 intrinsics." Category="avx512">
+      <EnumValue Name="false" DisplayName="No" />
+      <EnumValue Name="true" DisplayName="Yes" />
+    </EnumProperty>
+    <EnumProperty Name="Option-avx2" DisplayName="Enable AVX2 Intrinsics" Description="Use AVX2 intrinsics." Category="avx2">
+      <EnumValue Name="false" DisplayName="No" />
+      <EnumValue Name="true" DisplayName="Yes" />
+    </EnumProperty>
+    <EnumProperty Name="Option-sse41" DisplayName="Enable SSE4.1 Intrinsics" Description="Use SSE4.1 intrinsics." Category="sse41">
+      <EnumValue Name="false" DisplayName="No" />
+      <EnumValue Name="true" DisplayName="Yes" />
+    </EnumProperty>
+    <EnumProperty Name="Option-shani" DisplayName="Enable SHA Native Intrinsics" Description="Use SHA native intrinsics." Category="shani">
+      <EnumValue Name="false" DisplayName="No" />
+      <EnumValue Name="true" DisplayName="Yes" />
+    </EnumProperty>
+    <EnumProperty Name="Option-neon" DisplayName="Enable ARM Neon Intrinsics" Description="Use ARM Neon intrinsics." Category="neon">
+      <EnumValue Name="false" DisplayName="No" />
+      <EnumValue Name="true" DisplayName="Yes" />
+    </EnumProperty>
+  </Rule>  
 </ProjectSchemaDefinitions>
\ No newline at end of file
diff --git a/props/version4/project/libbitcoin-system/libbitcoin-system-test/libbitcoin-system-test.props b/props/version4/project/libbitcoin-system/libbitcoin-system-test/libbitcoin-system-test.props
index 42748600..40ccb851 100644
--- a/props/version4/project/libbitcoin-system/libbitcoin-system-test/libbitcoin-system-test.props
+++ b/props/version4/project/libbitcoin-system/libbitcoin-system-test/libbitcoin-system-test.props
@@ -21,7 +21,6 @@
       <!--<Optimization>Disabled</Optimization>-->
       <DisableSpecificWarnings>%(DisableSpecificWarnings)</DisableSpecificWarnings>
       <EnablePREfast>false</EnablePREfast>
-      <PreprocessorDefinitions Condition="'$(Option-datagen)' == 'true'">ENABLE_DATAGEN;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <PreprocessorDefinitions Condition="'$(DefaultLinkage)' == 'dynamic'">BOOST_TEST_DYN_LINK;%(PreprocessorDefinitions)</PreprocessorDefinitions>
     </ClCompile>
     <PostBuildEvent Condition="'$(DebugOrRelease)' == 'release'">
@@ -57,7 +56,6 @@
   <Target Name="LinkageInfo" BeforeTargets="PrepareForBuild">
     <Message Text="Linkage-secp256k1 : $(Linkage-secp256k1)" Importance="high"/>
     <Message Text="Linkage-_system   : $(Linkage-libbitcoin-system)" Importance="high"/>
-    <!--<Message Text="Linkage-openssl   : $(Linkage-openssl)" Importance="high" Condition="'$(Option-datagen)' == 'true'"/>-->
   </Target>
 
 </Project>
diff --git a/props/version4/project/libbitcoin-system/libbitcoin-system-test/libbitcoin-system-test.xml b/props/version4/project/libbitcoin-system/libbitcoin-system-test/libbitcoin-system-test.xml
index 8246b1a2..2d1704d3 100644
--- a/props/version4/project/libbitcoin-system/libbitcoin-system-test/libbitcoin-system-test.xml
+++ b/props/version4/project/libbitcoin-system/libbitcoin-system-test/libbitcoin-system-test.xml
@@ -1,15 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
 <ProjectSchemaDefinitions xmlns="clr-namespace:Microsoft.Build.Framework.XamlTypes;assembly=Microsoft.Build.Framework">
   <Rule Name="libbitcoin-system-test-uiextension" PageTemplate="tool" DisplayName="Bitcoin System Test Options" SwitchPrefix="/" Order="1">
-    <Rule.Categories>
-      <Category Name="datagen" DisplayName="datagen" />
-    </Rule.Categories>
-    <Rule.DataSource>
-      <DataSource Persistence="ProjectFile" ItemType="" />
-    </Rule.DataSource>
-    <EnumProperty Name="Option-datagen" DisplayName="Enable Test Data Generation" Description="Enable the Test Data Generation build option" Category="datagen">
-      <EnumValue Name="" DisplayName="No" />
-      <EnumValue Name="true" DisplayName="Yes" />
-    </EnumProperty>
   </Rule>
 </ProjectSchemaDefinitions>
\ No newline at end of file
diff --git a/props/version4/project/libbitcoin-system/libbitcoin-system/libbitcoin-system.props b/props/version4/project/libbitcoin-system/libbitcoin-system/libbitcoin-system.props
index 3ca04e0f..3bf5c75a 100644
--- a/props/version4/project/libbitcoin-system/libbitcoin-system/libbitcoin-system.props
+++ b/props/version4/project/libbitcoin-system/libbitcoin-system/libbitcoin-system.props
@@ -21,17 +21,16 @@
       <EnablePREfast>false</EnablePREfast>
       <!-- WITH_ICU always defined in Visual Studio builds. -->
       <!-- NOMINMAX enables use of std::min/max without conflict. -->
-      <!-- BOOST_EXCEPTION_DISABLE must be set here to be captured by all includes. -->
       <!-- WIN32_LEAN_AND_MEAN avoids inclusion of certain headers, winsock.h conflicts with boost and protocol use of winsock2.h. -->
       <PreprocessorDefinitions>WITH_ICU;WIN32_LEAN_AND_MEAN;NOMINMAX;_WIN32_WINNT=0x0600;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <PreprocessorDefinitions Condition="'$(ConfigurationType)' == 'DynamicLibrary'">BC_DLL;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <PreprocessorDefinitions Condition="'$(ConfigurationType)' == 'StaticLibrary'">BC_STATIC;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <!-- Enable use of CPU intrinsics. -->
-      <PreprocessorDefinitions Condition="'$(Option-avx2)'  == 'true'">WITH_AVX2;%(PreprocessorDefinitions)</PreprocessorDefinitions>
-      <PreprocessorDefinitions Condition="'$(Option-sse41)' == 'true'">WITH_SSE41;%(PreprocessorDefinitions)</PreprocessorDefinitions>
-      <PreprocessorDefinitions Condition="'$(Option-shani)' == 'true'">WITH_SHANI;%(PreprocessorDefinitions)</PreprocessorDefinitions>
-      <PreprocessorDefinitions Condition="'$(Option-sse4)'   == 'true'">WITH_SSE4;%(PreprocessorDefinitions)</PreprocessorDefinitions>
-      <PreprocessorDefinitions Condition="'$(Option-neon)'  == 'true'">WITH_NEON;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions Condition="'$(Option-avx512)' == 'true'">WITH_AVX512;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions Condition="'$(Option-avx2)'   == 'true'">WITH_AVX2;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions Condition="'$(Option-sse41)'  == 'true'">WITH_SSE41;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions Condition="'$(Option-shani)'  == 'true'">WITH_SHANI;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions Condition="'$(Option-neon)'   == 'true'">WITH_NEON;%(PreprocessorDefinitions)</PreprocessorDefinitions>
     </ClCompile>
   </ItemDefinitionGroup>
 
@@ -50,10 +49,35 @@
   <PropertyGroup Condition="'$(DefaultLinkage)' == 'static'">
     <Linkage-secp256k1>static</Linkage-secp256k1>
   </PropertyGroup>
+  
+  <!-- Options -->
+
+  <!-- These create non-portability. -->
+  <!-- These will compile to the target regardless of the compiling platform. -->
+  <!-- That will result in a crash of test/executable execution if mismatched. -->
+  <PropertyGroup>
+    <Option-avx512>false</Option-avx512>
+    <Option-avx2>true</Option-avx2>
+    <Option-sse41>true</Option-sse41>
+    <Option-shani>false</Option-shani>
+    <Option-neon>false</Option-neon>
+  </PropertyGroup>
+  <ItemDefinitionGroup>
+    <ClCompile>
+      <!-- order matters -->
+      <EnableEnhancedInstructionSet Condition="'$(Option-avx2)'   == 'true'">AdvancedVectorExtensions2</EnableEnhancedInstructionSet>
+      <EnableEnhancedInstructionSet Condition="'$(Option-avx512)' == 'true'">AdvancedVectorExtensions512</EnableEnhancedInstructionSet>
+    </ClCompile>
+  </ItemDefinitionGroup>
 
   <!-- Messages -->
 
   <Target Name="OptionInfo" BeforeTargets="PrepareForBuild">
+    <Message Text="Option-avx512     : $(Option-avx512)" Importance="high"/>
+    <Message Text="Option-avx2       : $(Option-avx2)" Importance="high"/>
+    <Message Text="Option-sse41      : $(Option-sse41)" Importance="high"/>
+    <Message Text="Option-shani      : $(Option-shani)" Importance="high"/>
+    <Message Text="Option-neon       : $(Option-neon)" Importance="high"/>
   </Target>
 
   <Target Name="LinkageInfo" BeforeTargets="PrepareForBuild">
diff --git a/props/version4/project/libbitcoin-system/libbitcoin-system/libbitcoin-system.xml b/props/version4/project/libbitcoin-system/libbitcoin-system/libbitcoin-system.xml
index 741f2d26..4c4cf1e3 100644
--- a/props/version4/project/libbitcoin-system/libbitcoin-system/libbitcoin-system.xml
+++ b/props/version4/project/libbitcoin-system/libbitcoin-system/libbitcoin-system.xml
@@ -2,33 +2,33 @@
 <ProjectSchemaDefinitions xmlns="clr-namespace:Microsoft.Build.Framework.XamlTypes;assembly=Microsoft.Build.Framework">
   <Rule Name="libbitcoin-system-uiextension" PageTemplate="tool" DisplayName="Bitcoin System Options" SwitchPrefix="/" Order="1">
     <Rule.Categories>
+      <Category Name="avx512" DisplayName="avx512" />
       <Category Name="avx2" DisplayName="avx2" />
       <Category Name="sse41" DisplayName="sse41" />
       <Category Name="shani" DisplayName="shani" />
-      <Category Name="sse4" DisplayName="sse4" />
       <Category Name="neon" DisplayName="neon" />
     </Rule.Categories>
     <Rule.DataSource>
       <DataSource Persistence="ProjectFile" ItemType="" />
     </Rule.DataSource>
+    <EnumProperty Name="Option-avx512" DisplayName="Enable AVX512 Intrinsics" Description="Use AVX512 intrinsics." Category="avx512">
+      <EnumValue Name="false" DisplayName="No" />
+      <EnumValue Name="true" DisplayName="Yes" />
+    </EnumProperty>
     <EnumProperty Name="Option-avx2" DisplayName="Enable AVX2 Intrinsics" Description="Use AVX2 intrinsics." Category="avx2">
-      <EnumValue Name="" DisplayName="No" />
+      <EnumValue Name="false" DisplayName="No" />
       <EnumValue Name="true" DisplayName="Yes" />
     </EnumProperty>
     <EnumProperty Name="Option-sse41" DisplayName="Enable SSE4.1 Intrinsics" Description="Use SSE4.1 intrinsics." Category="sse41">
-      <EnumValue Name="" DisplayName="No" />
+      <EnumValue Name="false" DisplayName="No" />
       <EnumValue Name="true" DisplayName="Yes" />
     </EnumProperty>
     <EnumProperty Name="Option-shani" DisplayName="Enable SHA Native Intrinsics" Description="Use SHA native intrinsics." Category="shani">
-      <EnumValue Name="" DisplayName="No" />
+      <EnumValue Name="false" DisplayName="No" />
       <EnumValue Name="true" DisplayName="Yes" />
     </EnumProperty>
     <EnumProperty Name="Option-neon" DisplayName="Enable ARM Neon Intrinsics" Description="Use ARM Neon intrinsics." Category="neon">
-      <EnumValue Name="" DisplayName="No" />
-      <EnumValue Name="true" DisplayName="Yes" />
-    </EnumProperty>
-    <EnumProperty Name="Option-sse4" DisplayName="Enable SSE4" Description="Use SSE4 intrinsics." Category="sse4">
-      <EnumValue Name="" DisplayName="No" />
+      <EnumValue Name="false" DisplayName="No" />
       <EnumValue Name="true" DisplayName="Yes" />
     </EnumProperty>
   </Rule>