diff --git a/samples/vboxwrapper/vbox_mscom_impl.cpp b/samples/vboxwrapper/vbox_mscom_impl.cpp
index 85213b9fef..be3716ae25 100644
--- a/samples/vboxwrapper/vbox_mscom_impl.cpp
+++ b/samples/vboxwrapper/vbox_mscom_impl.cpp
@@ -47,7 +47,6 @@ void virtualbox_dump_error() {
     HRESULT rc;
     char buf[256];
     IErrorInfo* pErrorInfo = NULL;
-    BSTR strSource;
     BSTR strDescription;
 
     rc = GetErrorInfo(0, &pErrorInfo);
@@ -59,16 +58,6 @@ void virtualbox_dump_error() {
             rc
         );
     } else {
-        rc = pErrorInfo->GetSource(&strSource);
-        if (SUCCEEDED(rc) && strSource) {
-            fprintf(
-                stderr,
-                "%s Error source: %S\n",
-                vboxwrapper_msg_prefix(buf, sizeof(buf)),
-                strSource
-            );
-            SysFreeString(strSource);
-        }
         rc = pErrorInfo->GetDescription(&strDescription);
         if (SUCCEEDED(rc) && strDescription) {
             fprintf(
diff --git a/win_build/vboxwrapper.vcxproj b/win_build/vboxwrapper.vcxproj
index 421d0c4701..c8be822c1b 100644
--- a/win_build/vboxwrapper.vcxproj
+++ b/win_build/vboxwrapper.vcxproj
@@ -293,6 +293,7 @@
     <ClCompile Include="..\samples\vboxwrapper\floppyio.cpp" />
     <ClCompile Include="..\samples\vboxwrapper\vboxwrapper.cpp" />
     <ClCompile Include="..\samples\vboxwrapper\vbox_common.cpp" />
+    <ClCompile Include="..\samples\vboxwrapper\vbox_mscom41.cpp" />
     <ClCompile Include="..\samples\vboxwrapper\vbox_mscom42.cpp" />
     <ClCompile Include="..\samples\vboxwrapper\vbox_mscom43.cpp" />
     <ClCompile Include="..\samples\vboxwrapper\vbox_mscom_impl.cpp" />
@@ -303,6 +304,7 @@
     <ClInclude Include="..\samples\vboxwrapper\vboxwrapper.h" />
     <ClInclude Include="..\samples\vboxwrapper\vboxwrapper_win.h" />
     <ClInclude Include="..\samples\vboxwrapper\vbox_common.h" />
+    <ClInclude Include="..\samples\vboxwrapper\vbox_mscom41.h" />
     <ClInclude Include="..\samples\vboxwrapper\vbox_mscom42.h" />
     <ClInclude Include="..\samples\vboxwrapper\vbox_mscom43.h" />
     <ClInclude Include="..\samples\vboxwrapper\vbox_mscom_impl.h" />