diff --git a/Windows81SDKVS12_x64.props b/Windows81SDKVS12_x64.props
deleted file mode 100644
index 3a965ee..0000000
--- a/Windows81SDKVS12_x64.props
+++ /dev/null
@@ -1,12 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
-  <ImportGroup Label="PropertySheets" />
-  <PropertyGroup Label="UserMacros" />
-  <PropertyGroup>
-    <ExecutablePath>$(ProgramFiles)\Windows Kits\8.1\bin\x64;$(ExecutablePath)</ExecutablePath>
-    <IncludePath>$(ProgramFiles)\Windows Kits\8.1\Include\um;$(ProgramFiles)\Windows Kits\8.1\Include\shared;$(ProgramFiles)\Windows Kits\8.1\Include\winrt;$(IncludePath)</IncludePath>
-    <LibraryPath>$(ProgramFiles)\Windows Kits\8.1\lib\winv6.3\um\x64;$(LibraryPath)</LibraryPath>
-    <ExcludePath>$(ProgramFiles)\Windows Kits\8.1\Include\um;$(ProgramFiles)\Windows Kits\8.1\Include\shared;$(ProgramFiles)\Windows Kits\8.1\Include\winrt;$(ExcludePath)</ExcludePath>
-  </PropertyGroup>
-<ItemDefinitionGroup />
-</Project>
\ No newline at end of file
diff --git a/Windows81SDKVS12_x86.props b/Windows81SDKVS12_x86.props
deleted file mode 100644
index 3c734a6..0000000
--- a/Windows81SDKVS12_x86.props
+++ /dev/null
@@ -1,12 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
-  <ImportGroup Label="PropertySheets" />
-  <PropertyGroup Label="UserMacros" />
-  <PropertyGroup>
-    <ExecutablePath>$(ProgramFiles)\Windows Kits\8.1\bin\x86;$(ExecutablePath)</ExecutablePath>
-    <IncludePath>$(ProgramFiles)\Windows Kits\8.1\Include\um;$(ProgramFiles)\Windows Kits\8.1\Include\shared;$(ProgramFiles)\Windows Kits\8.1\Include\winrt;$(IncludePath)</IncludePath>
-    <LibraryPath>$(ProgramFiles)\Windows Kits\8.1\lib\winv6.3\um\x86;$(LibraryPath)</LibraryPath>
-    <ExcludePath>$(ProgramFiles)\Windows Kits\8.1\Include\um;$(ProgramFiles)\Windows Kits\8.1\Include\shared;$(ProgramFiles)\Windows Kits\8.1\Include\winrt;$(ExcludePath)</ExcludePath>
-  </PropertyGroup>
-<ItemDefinitionGroup />
-</Project>
\ No newline at end of file
diff --git a/Windows81SDK_x64.props b/Windows81SDK_x64.props
deleted file mode 100644
index 79ca10e..0000000
--- a/Windows81SDK_x64.props
+++ /dev/null
@@ -1,12 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
-  <ImportGroup Label="PropertySheets" />
-  <PropertyGroup Label="UserMacros" />
-  <PropertyGroup>
-    <ExecutablePath>$(VCInstallDir)bin\x86_amd64;$(VCInstallDir)bin;$(WindowsSdkDir)bin\NETFX 4.0 Tools;$(ProgramFiles)\Windows Kits\8.1\bin\x86;$(VSInstallDir)Common7\Tools\bin;$(VSInstallDir)Common7\tools;$(VSInstallDir)Common7\ide;$(ProgramFiles)\HTML Help Workshop;$(FrameworkSDKDir)\bin;$(MSBuildToolsPath32);$(VSInstallDir);$(SystemRoot)\SysWow64;$(FxCopDir);$(PATH)</ExecutablePath>
-    <IncludePath>$(ProgramFiles)\Windows Kits\8.1\Include\um;$(ProgramFiles)\Windows Kits\8.1\Include\shared;$(ProgramFiles)\Windows Kits\8.1\Include\winrt;$(VCInstallDir)include;$(VCInstallDir)atlmfc\include;$(FrameworkSDKDir)\include;</IncludePath>
-    <LibraryPath>$(VCInstallDir)lib\amd64;$(VCInstallDir)atlmfc\lib\amd64;$(ProgramFiles)\Windows Kits\8.1\lib\winv6.3\um\x64;$(FrameworkSDKDir)\lib\x64</LibraryPath>
-    <ExcludePath>$(VCInstallDir)include;$(VCInstallDir)atlmfc\include;$(ProgramFiles)\Windows Kits\8.1\Include\um;$(ProgramFiles)\Windows Kits\8.1\Include\shared;$(ProgramFiles)\Windows Kits\8.1\Include\winrt;$(FrameworkSDKDir)\include;$(MSBuildToolsPath32);$(VCInstallDir)atlmfc\lib;$(VCInstallDir)lib;</ExcludePath>
-  </PropertyGroup>
-<ItemDefinitionGroup />
-</Project>
\ No newline at end of file
diff --git a/Windows81SDK_x86.props b/Windows81SDK_x86.props
deleted file mode 100644
index 04750b6..0000000
--- a/Windows81SDK_x86.props
+++ /dev/null
@@ -1,12 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
-  <ImportGroup Label="PropertySheets" />
-  <PropertyGroup Label="UserMacros" />
-  <PropertyGroup>
-    <ExecutablePath>$(VCInstallDir)bin;$(WindowsSdkDir)bin\NETFX 4.0 Tools;$(ProgramFiles)\Windows Kits\8.1\bin\x86;$(VSInstallDir)Common7\Tools\bin;$(VSInstallDir)Common7\tools;$(VSInstallDir)Common7\ide;$(ProgramFiles)\HTML Help Workshop;$(FrameworkSDKDir)\bin;$(MSBuildToolsPath32);$(VSInstallDir);$(SystemRoot)\SysWow64;$(FxCopDir);$(PATH)</ExecutablePath>
-    <IncludePath>$(ProgramFiles)\Windows Kits\8.1\Include\um;$(ProgramFiles)\Windows Kits\8.1\Include\shared;$(ProgramFiles)\Windows Kits\8.1\Include\winrt;$(VCInstallDir)include;$(VCInstallDir)atlmfc\include;$(FrameworkSDKDir)\include;</IncludePath>
-    <LibraryPath>$(VCInstallDir)lib;$(VCInstallDir)atlmfc\lib;$(ProgramFiles)\Windows Kits\8.1\lib\winv6.3\um\x86;$(FrameworkSDKDir)\lib</LibraryPath>
-    <ExcludePath>$(VCInstallDir)include;$(VCInstallDir)atlmfc\include;$(ProgramFiles)\Windows Kits\8.1\Include\um;$(ProgramFiles)\Windows Kits\8.1\Include\shared;$(ProgramFiles)\Windows Kits\8.1\Include\winrt;$(FrameworkSDKDir)\include;$(MSBuildToolsPath32);$(VCInstallDir)atlmfc\lib;$(VCInstallDir)lib;</ExcludePath>
-  </PropertyGroup>
-<ItemDefinitionGroup />
-</Project>
\ No newline at end of file