diff --git a/Visual Studio Projects/PDP11.vcproj b/Visual Studio Projects/PDP11.vcproj
index ec24e7e4..fc4f4b67 100644
--- a/Visual Studio Projects/PDP11.vcproj	
+++ b/Visual Studio Projects/PDP11.vcproj	
@@ -26,6 +26,8 @@
 			>
 			<Tool
 				Name="VCPreBuildEventTool"
+				Description="Check for required build dependencies"
+				CommandLine="if not exist ../../windows-build/winpcap/Wpdpack/Include/pcap.h goto _notice&#x0D;&#x0A;if not exist ../../windows-build/pthreads/pthread.h goto _notice&#x0D;&#x0A;goto _good&#x0D;&#x0A;&#x0D;&#x0A;:_notice&#x0D;&#x0A;echo ****************************************************&#x0D;&#x0A;echo ****************************************************&#x0D;&#x0A;echo **  The required build support is not available.  **&#x0D;&#x0A;echo ****************************************************&#x0D;&#x0A;echo ****************************************************&#x0D;&#x0A;type 0ReadMe_Projects.txt&#x0D;&#x0A;exit 1&#x0D;&#x0A;&#x0D;&#x0A;:_good&#x0D;&#x0A;"
 			/>
 			<Tool
 				Name="VCCustomBuildTool"
@@ -106,6 +108,8 @@
 			>
 			<Tool
 				Name="VCPreBuildEventTool"
+				Description="Check for required build dependencies"
+				CommandLine="if not exist ../../windows-build/winpcap/Wpdpack/Include/pcap.h goto _notice&#x0D;&#x0A;if not exist ../../windows-build/pthreads/pthread.h goto _notice&#x0D;&#x0A;goto _good&#x0D;&#x0A;&#x0D;&#x0A;:_notice&#x0D;&#x0A;echo ****************************************************&#x0D;&#x0A;echo ****************************************************&#x0D;&#x0A;echo **  The required build support is not available.  **&#x0D;&#x0A;echo ****************************************************&#x0D;&#x0A;echo ****************************************************&#x0D;&#x0A;type 0ReadMe_Projects.txt&#x0D;&#x0A;exit 1&#x0D;&#x0A;&#x0D;&#x0A;:_good&#x0D;&#x0A;"
 			/>
 			<Tool
 				Name="VCCustomBuildTool"
diff --git a/Visual Studio Projects/VAX.vcproj b/Visual Studio Projects/VAX.vcproj
index 69438a10..13136d28 100644
--- a/Visual Studio Projects/VAX.vcproj	
+++ b/Visual Studio Projects/VAX.vcproj	
@@ -26,8 +26,8 @@
 			>
 			<Tool
 				Name="VCPreBuildEventTool"
-				Description="Build Dependent ROM include File(s)"
-				CommandLine="pushd ..&#x0D;&#x0A;$(TargetDir)BuildROMs&#x0D;&#x0A;popd&#x0D;&#x0A;"
+				Description="Build Dependent ROM include File(s) &amp; Check for required build dependencies"
+				CommandLine="pushd ..&#x0D;&#x0A;$(TargetDir)BuildROMs&#x0D;&#x0A;popd&#x0D;&#x0A;&#x0D;&#x0A;if not exist ../../windows-build/winpcap/Wpdpack/Include/pcap.h goto _notice&#x0D;&#x0A;if not exist ../../windows-build/pthreads/pthread.h goto _notice&#x0D;&#x0A;goto _good&#x0D;&#x0A;&#x0D;&#x0A;:_notice&#x0D;&#x0A;echo ****************************************************&#x0D;&#x0A;echo ****************************************************&#x0D;&#x0A;echo **  The required build support is not available.  **&#x0D;&#x0A;echo ****************************************************&#x0D;&#x0A;echo ****************************************************&#x0D;&#x0A;type 0ReadMe_Projects.txt&#x0D;&#x0A;exit 1&#x0D;&#x0A;&#x0D;&#x0A;:_good&#x0D;&#x0A;"
 			/>
 			<Tool
 				Name="VCCustomBuildTool"
@@ -112,8 +112,8 @@
 			>
 			<Tool
 				Name="VCPreBuildEventTool"
-				Description="Build Dependent ROM include File(s)"
-				CommandLine="pushd ..&#x0D;&#x0A;$(TargetDir)BuildROMs&#x0D;&#x0A;popd&#x0D;&#x0A;"
+				Description="Build Dependent ROM include File(s) &amp; Check for required build dependencies"
+				CommandLine="pushd ..&#x0D;&#x0A;$(TargetDir)BuildROMs&#x0D;&#x0A;popd&#x0D;&#x0A;&#x0D;&#x0A;if not exist ../../windows-build/winpcap/Wpdpack/Include/pcap.h goto _notice&#x0D;&#x0A;if not exist ../../windows-build/pthreads/pthread.h goto _notice&#x0D;&#x0A;goto _good&#x0D;&#x0A;&#x0D;&#x0A;:_notice&#x0D;&#x0A;echo ****************************************************&#x0D;&#x0A;echo ****************************************************&#x0D;&#x0A;echo **  The required build support is not available.  **&#x0D;&#x0A;echo ****************************************************&#x0D;&#x0A;echo ****************************************************&#x0D;&#x0A;type 0ReadMe_Projects.txt&#x0D;&#x0A;exit 1&#x0D;&#x0A;&#x0D;&#x0A;:_good&#x0D;&#x0A;"
 			/>
 			<Tool
 				Name="VCCustomBuildTool"
diff --git a/Visual Studio Projects/VAX780.vcproj b/Visual Studio Projects/VAX780.vcproj
index e81699e3..a2425a5f 100644
--- a/Visual Studio Projects/VAX780.vcproj	
+++ b/Visual Studio Projects/VAX780.vcproj	
@@ -26,8 +26,8 @@
 			>
 			<Tool
 				Name="VCPreBuildEventTool"
-				Description="Build Dependent ROM include File(s)"
-				CommandLine="pushd ..&#x0D;&#x0A;$(TargetDir)BuildROMs&#x0D;&#x0A;popd&#x0D;&#x0A;"
+				Description="Build Dependent ROM include File(s) &amp; Check for required build dependencies"
+				CommandLine="pushd ..&#x0D;&#x0A;$(TargetDir)BuildROMs&#x0D;&#x0A;popd&#x0D;&#x0A;&#x0D;&#x0A;if not exist ../../windows-build/winpcap/Wpdpack/Include/pcap.h goto _notice&#x0D;&#x0A;if not exist ../../windows-build/pthreads/pthread.h goto _notice&#x0D;&#x0A;goto _good&#x0D;&#x0A;&#x0D;&#x0A;:_notice&#x0D;&#x0A;echo ****************************************************&#x0D;&#x0A;echo ****************************************************&#x0D;&#x0A;echo **  The required build support is not available.  **&#x0D;&#x0A;echo ****************************************************&#x0D;&#x0A;echo ****************************************************&#x0D;&#x0A;type 0ReadMe_Projects.txt&#x0D;&#x0A;exit 1&#x0D;&#x0A;&#x0D;&#x0A;:_good&#x0D;&#x0A;"
 			/>
 			<Tool
 				Name="VCCustomBuildTool"
@@ -111,8 +111,8 @@
 			>
 			<Tool
 				Name="VCPreBuildEventTool"
-				Description="Build Dependent ROM include File(s)"
-				CommandLine="pushd ..&#x0D;&#x0A;$(TargetDir)BuildROMs&#x0D;&#x0A;popd&#x0D;&#x0A;"
+				Description="Build Dependent ROM include File(s) &amp; Check for required build dependencies"
+				CommandLine="pushd ..&#x0D;&#x0A;$(TargetDir)BuildROMs&#x0D;&#x0A;popd&#x0D;&#x0A;&#x0D;&#x0A;if not exist ../../windows-build/winpcap/Wpdpack/Include/pcap.h goto _notice&#x0D;&#x0A;if not exist ../../windows-build/pthreads/pthread.h goto _notice&#x0D;&#x0A;goto _good&#x0D;&#x0A;&#x0D;&#x0A;:_notice&#x0D;&#x0A;echo ****************************************************&#x0D;&#x0A;echo ****************************************************&#x0D;&#x0A;echo **  The required build support is not available.  **&#x0D;&#x0A;echo ****************************************************&#x0D;&#x0A;echo ****************************************************&#x0D;&#x0A;type 0ReadMe_Projects.txt&#x0D;&#x0A;exit 1&#x0D;&#x0A;&#x0D;&#x0A;:_good&#x0D;&#x0A;"
 			/>
 			<Tool
 				Name="VCCustomBuildTool"