diff -r 3ac8f9d5c2d8 PCbuild/pythoncore.vcxproj
--- a/PCbuild/pythoncore.vcxproj	Mon Nov 25 15:07:18 2013 -0800
+++ b/PCbuild/pythoncore.vcxproj	Mon Nov 25 22:17:01 2013 -0600
@@ -231,6 +231,12 @@
       <IgnoreSpecificDefaultLibraries>libc;%(IgnoreSpecificDefaultLibraries)</IgnoreSpecificDefaultLibraries>
       <BaseAddress>0x1e000000</BaseAddress>
     </Link>
+    <PreBuildEvent>
+      <Command>$(KillPythonExe)</Command>
+    </PreBuildEvent>
+    <PreBuildEvent>
+      <Message>Killing any running $(PythonExe) instances...</Message>
+    </PreBuildEvent>
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
     <Midl>
@@ -688,4 +694,4 @@
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
   <ImportGroup Label="ExtensionTargets">
   </ImportGroup>
-</Project>
+</Project>
\ No newline at end of file
diff -r 3ac8f9d5c2d8 Tools/buildbot/build-amd64.bat
--- a/Tools/buildbot/build-amd64.bat	Mon Nov 25 15:07:18 2013 -0800
+++ b/Tools/buildbot/build-amd64.bat	Mon Nov 25 22:17:01 2013 -0600
@@ -2,6 +2,5 @@
 cmd /c Tools\buildbot\external-amd64.bat
 call "%VS100COMNTOOLS%\..\..\VC\vcvarsall.bat" x86_amd64
 cmd /c Tools\buildbot\clean-amd64.bat
-msbuild PCbuild\kill_python.vcxproj /p:Configuration=Debug /p:PlatformTarget=x64
-PCbuild\amd64\kill_python_d.exe
+
 msbuild PCbuild\pcbuild.sln /p:Configuration=Debug /p:Platform=x64
diff -r 3ac8f9d5c2d8 Tools/buildbot/build.bat
--- a/Tools/buildbot/build.bat	Mon Nov 25 15:07:18 2013 -0800
+++ b/Tools/buildbot/build.bat	Mon Nov 25 22:17:01 2013 -0600
@@ -2,7 +2,6 @@
 cmd /c Tools\buildbot\external.bat
 call "%VS100COMNTOOLS%vsvars32.bat"
 cmd /c Tools\buildbot\clean.bat
-msbuild PCbuild\kill_python.vcxproj /p:Configuration=Debug /p:PlatformTarget=x86
-PCbuild\kill_python_d.exe
+
 msbuild PCbuild\pcbuild.sln /p:Configuration=Debug /p:Platform=Win32