diff --git a/racket/src/worksp/gracket/gracket.vcxproj b/racket/src/worksp/gracket/gracket.vcxproj
index 1a0d559168..7a52867d76 100644
--- a/racket/src/worksp/gracket/gracket.vcxproj
+++ b/racket/src/worksp/gracket/gracket.vcxproj
@@ -42,6 +42,7 @@
     <ConfigurationType>Application</ConfigurationType>
     <UseOfMfc>false</UseOfMfc>
     <CharacterSet>MultiByte</CharacterSet>
+    <PlatformToolset>v100</PlatformToolset>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
   <ImportGroup Label="ExtensionSettings">
diff --git a/racket/src/worksp/libffi/libffi.vcxproj b/racket/src/worksp/libffi/libffi.vcxproj
index 710e55e770..7c904451e0 100644
--- a/racket/src/worksp/libffi/libffi.vcxproj
+++ b/racket/src/worksp/libffi/libffi.vcxproj
@@ -27,20 +27,24 @@
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
     <ConfigurationType>StaticLibrary</ConfigurationType>
     <CharacterSet>Unicode</CharacterSet>
+    <PlatformToolset>v100</PlatformToolset>
     <WholeProgramOptimization>true</WholeProgramOptimization>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
     <ConfigurationType>StaticLibrary</ConfigurationType>
     <CharacterSet>Unicode</CharacterSet>
+    <PlatformToolset>v100</PlatformToolset>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="Configuration">
     <ConfigurationType>StaticLibrary</ConfigurationType>
     <CharacterSet>Unicode</CharacterSet>
+    <PlatformToolset>v100</PlatformToolset>
     <WholeProgramOptimization>true</WholeProgramOptimization>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="Configuration">
     <ConfigurationType>StaticLibrary</ConfigurationType>
     <CharacterSet>Unicode</CharacterSet>
+    <PlatformToolset>v100</PlatformToolset>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
   <ImportGroup Label="ExtensionSettings">
diff --git a/racket/src/worksp/libmzgc/libmzgc.vcxproj b/racket/src/worksp/libmzgc/libmzgc.vcxproj
index a76ef5d07b..3bbad1c46b 100644
--- a/racket/src/worksp/libmzgc/libmzgc.vcxproj
+++ b/racket/src/worksp/libmzgc/libmzgc.vcxproj
@@ -26,21 +26,25 @@
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     <UseOfMfc>false</UseOfMfc>
     <CharacterSet>MultiByte</CharacterSet>
+    <PlatformToolset>v100</PlatformToolset>
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   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
     <ConfigurationType>DynamicLibrary</ConfigurationType>
     <UseOfMfc>false</UseOfMfc>
     <CharacterSet>MultiByte</CharacterSet>
+    <PlatformToolset>v100</PlatformToolset>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="Configuration">
     <ConfigurationType>DynamicLibrary</ConfigurationType>
     <UseOfMfc>false</UseOfMfc>
     <CharacterSet>MultiByte</CharacterSet>
+    <PlatformToolset>v100</PlatformToolset>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="Configuration">
     <ConfigurationType>DynamicLibrary</ConfigurationType>
     <UseOfMfc>false</UseOfMfc>
     <CharacterSet>MultiByte</CharacterSet>
+    <PlatformToolset>v100</PlatformToolset>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
   <ImportGroup Label="ExtensionSettings">
diff --git a/racket/src/worksp/libracket/libracket.vcxproj b/racket/src/worksp/libracket/libracket.vcxproj
index 73a59ca01c..f63c8903e9 100644
--- a/racket/src/worksp/libracket/libracket.vcxproj
+++ b/racket/src/worksp/libracket/libracket.vcxproj
@@ -42,6 +42,7 @@
     <ConfigurationType>DynamicLibrary</ConfigurationType>
     <UseOfMfc>false</UseOfMfc>
     <CharacterSet>MultiByte</CharacterSet>
+    <PlatformToolset>v100</PlatformToolset>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
   <ImportGroup Label="ExtensionSettings">
diff --git a/racket/src/worksp/mrstart/mrstart.vcxproj b/racket/src/worksp/mrstart/mrstart.vcxproj
index f4ac329841..3daf265623 100644
--- a/racket/src/worksp/mrstart/mrstart.vcxproj
+++ b/racket/src/worksp/mrstart/mrstart.vcxproj
@@ -17,10 +17,12 @@
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseOfMfc>false</UseOfMfc>
+    <PlatformToolset>v100</PlatformToolset>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseOfMfc>false</UseOfMfc>
+    <PlatformToolset>v100</PlatformToolset>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
   <ImportGroup Label="ExtensionSettings">
diff --git a/racket/src/worksp/mzcom/mzcom.vcxproj b/racket/src/worksp/mzcom/mzcom.vcxproj
index 985e6c3498..e611b4972d 100644
--- a/racket/src/worksp/mzcom/mzcom.vcxproj
+++ b/racket/src/worksp/mzcom/mzcom.vcxproj
@@ -50,6 +50,7 @@
     <ConfigurationType>Application</ConfigurationType>
     <UseOfMfc>false</UseOfMfc>
     <CharacterSet>MultiByte</CharacterSet>
+    <PlatformToolset>v100</PlatformToolset>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
   <ImportGroup Label="ExtensionSettings">
diff --git a/racket/src/worksp/mzstart/mzstart.vcxproj b/racket/src/worksp/mzstart/mzstart.vcxproj
index f15bf95ec8..57e009aec9 100644
--- a/racket/src/worksp/mzstart/mzstart.vcxproj
+++ b/racket/src/worksp/mzstart/mzstart.vcxproj
@@ -17,10 +17,12 @@
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseOfMfc>false</UseOfMfc>
+    <PlatformToolset>v100</PlatformToolset>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseOfMfc>false</UseOfMfc>
+    <PlatformToolset>v100</PlatformToolset>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
   <ImportGroup Label="ExtensionSettings">
diff --git a/racket/src/worksp/sgc/sgc.vcxproj b/racket/src/worksp/sgc/sgc.vcxproj
index 2ff6e036d0..4ffc303a11 100644
--- a/racket/src/worksp/sgc/sgc.vcxproj
+++ b/racket/src/worksp/sgc/sgc.vcxproj
@@ -28,19 +28,23 @@
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     <CharacterSet>Unicode</CharacterSet>
     <WholeProgramOptimization>true</WholeProgramOptimization>
+    <PlatformToolset>v100</PlatformToolset>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
     <ConfigurationType>DynamicLibrary</ConfigurationType>
     <CharacterSet>Unicode</CharacterSet>
+    <PlatformToolset>v100</PlatformToolset>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="Configuration">
     <ConfigurationType>DynamicLibrary</ConfigurationType>
     <CharacterSet>Unicode</CharacterSet>
     <WholeProgramOptimization>true</WholeProgramOptimization>
+    <PlatformToolset>v100</PlatformToolset>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="Configuration">
     <ConfigurationType>DynamicLibrary</ConfigurationType>
     <CharacterSet>Unicode</CharacterSet>
+    <PlatformToolset>v100</PlatformToolset>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
   <ImportGroup Label="ExtensionSettings">