diff --git a/AI/BattleAI/BattleAI.vcxproj b/AI/BattleAI/BattleAI.vcxproj
index ce2ef9a06..d9d373681 100644
--- a/AI/BattleAI/BattleAI.vcxproj
+++ b/AI/BattleAI/BattleAI.vcxproj
@@ -113,6 +113,7 @@
       <PrecompiledHeader>Use</PrecompiledHeader>
       <PrecompiledHeaderFile>StdInc.h</PrecompiledHeaderFile>
       <AdditionalOptions>/Zm159 %(AdditionalOptions)</AdditionalOptions>
+      <MultiProcessorCompilation>true</MultiProcessorCompilation>
     </ClCompile>
     <Link>
       <AdditionalDependencies>VCMI_lib.lib;%(AdditionalDependencies)</AdditionalDependencies>
diff --git a/AI/EmptyAI/EmptyAI.vcxproj b/AI/EmptyAI/EmptyAI.vcxproj
index 52fd32638..6f9c4b7c0 100644
--- a/AI/EmptyAI/EmptyAI.vcxproj
+++ b/AI/EmptyAI/EmptyAI.vcxproj
@@ -144,6 +144,7 @@
       <PrecompiledHeaderFile>StdInc.h</PrecompiledHeaderFile>
       <PreprocessorDefinitions>_WINDLL;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <AdditionalOptions>/Zm130 %(AdditionalOptions)</AdditionalOptions>
+      <MultiProcessorCompilation>true</MultiProcessorCompilation>
     </ClCompile>
     <Link>
       <GenerateDebugInformation>true</GenerateDebugInformation>
diff --git a/AI/StupidAI/StupidAI.vcxproj b/AI/StupidAI/StupidAI.vcxproj
index 55190fc8e..2ecb3a53e 100644
--- a/AI/StupidAI/StupidAI.vcxproj
+++ b/AI/StupidAI/StupidAI.vcxproj
@@ -112,6 +112,7 @@
       <PrecompiledHeader>Use</PrecompiledHeader>
       <PrecompiledHeaderFile>StdInc.h</PrecompiledHeaderFile>
       <AdditionalOptions>/Zm150 %(AdditionalOptions)</AdditionalOptions>
+      <MultiProcessorCompilation>true</MultiProcessorCompilation>
     </ClCompile>
     <Link>
       <AdditionalDependencies>VCMI_lib.lib;%(AdditionalDependencies)</AdditionalDependencies>
diff --git a/AI/VCAI/VCAI.vcxproj b/AI/VCAI/VCAI.vcxproj
index b76460a92..db201b92a 100644
--- a/AI/VCAI/VCAI.vcxproj
+++ b/AI/VCAI/VCAI.vcxproj
@@ -116,6 +116,7 @@
       <PrecompiledHeader>Use</PrecompiledHeader>
       <PrecompiledHeaderFile>StdInc.h</PrecompiledHeaderFile>
       <AdditionalOptions>/Zm199 %(AdditionalOptions)</AdditionalOptions>
+      <MultiProcessorCompilation>true</MultiProcessorCompilation>
     </ClCompile>
     <Link>
       <AdditionalDependencies>VCMI_lib.lib;FuzzyLite.lib;%(AdditionalDependencies)</AdditionalDependencies>
diff --git a/client/VCMI_client.vcxproj b/client/VCMI_client.vcxproj
index 25679c314..8498ff874 100644
--- a/client/VCMI_client.vcxproj
+++ b/client/VCMI_client.vcxproj
@@ -95,9 +95,6 @@
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
     <LibraryWPath />
   </PropertyGroup>
-  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='RD|Win32'">
-    <IncludePath>$(SolutionDir)\..\include;$(IncludePath)</IncludePath>
-  </PropertyGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
     <ClCompile>
       <Optimization>
@@ -146,6 +143,7 @@
       <PrecompiledHeaderFile>StdInc.h</PrecompiledHeaderFile>
       <AdditionalOptions>/MP4 /Zm150</AdditionalOptions>
       <AdditionalIncludeDirectories>$(FFMPEGDIR);$(SDLDIR);$(BOOSTDIR);$(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <MultiProcessorCompilation>true</MultiProcessorCompilation>
     </ClCompile>
     <Link>
       <AdditionalDependencies>avcodec.lib;avdevice.lib;avfilter.lib;avformat.lib;avutil.lib;postproc.lib;swresample.lib;swscale.lib;zlib.lib;SDL2.lib;SDL2main.lib;VCMI_lib.lib;SDL2_mixer.lib;SDL2_image.lib;SDL2_ttf.lib;%(AdditionalDependencies)</AdditionalDependencies>
diff --git a/launcher/VCMI_launcher.vcxproj b/launcher/VCMI_launcher.vcxproj
index d60058ad6..7aa1c13a7 100644
--- a/launcher/VCMI_launcher.vcxproj
+++ b/launcher/VCMI_launcher.vcxproj
@@ -75,6 +75,7 @@
       <PrecompiledHeaderFile>StdInc.h</PrecompiledHeaderFile>
       <AdditionalOptions>/Zm150 %(AdditionalOptions)</AdditionalOptions>
       <PreprocessorDefinitions>%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <MultiProcessorCompilation>true</MultiProcessorCompilation>
     </ClCompile>
     <Link>
       <AdditionalDependencies>VCMI_lib.lib;Qt5Core.lib;Qt5Gui.lib;Qt5Widgets.lib;Qt5Network.lib;SDL2.lib;%(AdditionalDependencies)</AdditionalDependencies>
diff --git a/lib/VCMI_lib.vcxproj b/lib/VCMI_lib.vcxproj
index 707d0d284..a850c5763 100644
--- a/lib/VCMI_lib.vcxproj
+++ b/lib/VCMI_lib.vcxproj
@@ -140,6 +140,7 @@
       <PrecompiledHeaderFile>StdInc.h</PrecompiledHeaderFile>
       <PrecompiledHeader>Use</PrecompiledHeader>
       <AdditionalIncludeDirectories>$(BOOSTDIR);$(ZLIBDIR);$(SDLDIR)</AdditionalIncludeDirectories>
+      <MultiProcessorCompilation>true</MultiProcessorCompilation>
     </ClCompile>
     <Link>
       <AdditionalDependencies>minizip.lib;zlib.lib;%(AdditionalDependencies)</AdditionalDependencies>
@@ -437,4 +438,4 @@
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
   <ImportGroup Label="ExtensionTargets">
   </ImportGroup>
-</Project>
+</Project>
\ No newline at end of file
diff --git a/lib/minizip/minizip.vcxproj b/lib/minizip/minizip.vcxproj
index 46416a3c7..23fab65d4 100644
--- a/lib/minizip/minizip.vcxproj
+++ b/lib/minizip/minizip.vcxproj
@@ -150,6 +150,7 @@
       <PreprocessorDefinitions>MINIZIP_DLL;ZLIB_DLL;ZLIB_INTERNAL;_CRT_SECURE_NO_WARNINGS;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <SDLCheck>true</SDLCheck>
       <AdditionalIncludeDirectories>F:\Programowanie\VCMI\include;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <MultiProcessorCompilation>true</MultiProcessorCompilation>
     </ClCompile>
     <Link>
       <SubSystem>Windows</SubSystem>
diff --git a/scripting/erm/ERM.vcxproj b/scripting/erm/ERM.vcxproj
index 8b0bae426..445cfc582 100644
--- a/scripting/erm/ERM.vcxproj
+++ b/scripting/erm/ERM.vcxproj
@@ -101,6 +101,7 @@
       <PrecompiledHeader>Use</PrecompiledHeader>
       <AdditionalOptions>/Zm218 %(AdditionalOptions)</AdditionalOptions>
       <PrecompiledHeaderFile>StdInc.h</PrecompiledHeaderFile>
+      <MultiProcessorCompilation>true</MultiProcessorCompilation>
     </ClCompile>
     <Link>
       <AdditionalDependencies>VCMI_lib.lib;%(AdditionalDependencies)</AdditionalDependencies>
diff --git a/server/VCMI_server.vcxproj b/server/VCMI_server.vcxproj
index 2c42a7153..99cb82dc5 100644
--- a/server/VCMI_server.vcxproj
+++ b/server/VCMI_server.vcxproj
@@ -128,6 +128,7 @@
       <DisableSpecificWarnings>4251;%(DisableSpecificWarnings)</DisableSpecificWarnings>
       <PrecompiledHeader>Use</PrecompiledHeader>
       <PrecompiledHeaderFile>StdInc.h</PrecompiledHeaderFile>
+      <MultiProcessorCompilation>true</MultiProcessorCompilation>
     </ClCompile>
     <Link>
       <AdditionalDependencies>VCMI_lib.lib;zlib.lib;%(AdditionalDependencies)</AdditionalDependencies>
diff --git a/test/Test.vcxproj b/test/Test.vcxproj
index 53c478b11..c4e7e9e8e 100644
--- a/test/Test.vcxproj
+++ b/test/Test.vcxproj
@@ -134,6 +134,7 @@
       <PrecompiledHeader>Use</PrecompiledHeader>
       <PrecompiledHeaderFile>StdInc.h</PrecompiledHeaderFile>
       <AdditionalOptions>/MP4 /Zm150</AdditionalOptions>
+      <MultiProcessorCompilation>true</MultiProcessorCompilation>
     </ClCompile>
     <Link>
       <AdditionalDependencies>VCMI_lib.lib;%(AdditionalDependencies)</AdditionalDependencies>