diff --git a/CMakeLists.txt b/CMakeLists.txt
index 2e3ccc70..a4344075 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -215,13 +215,9 @@ endmacro()
 
 set(CMAKE_CXX_STANDARD 17)
 if(WIN32)
-    get_WIN32_WINNT(ver)
-    add_definitions(-D_WIN32_WINNT=${ver} -DWNT -DWNT_WINDOW -DNOMINMAX)
     set(CMAKE_MFC_FLAG 0)
-    add_definitions(-DMSVC_EXPRESS -D_CRT_SECURE_NO_WARNINGS -DHAVE_STRUCT_TIMESPEC)
     # build convenience (aka object) libraries in windows)
     set(NG_LIB_TYPE OBJECT)
-    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /MP")
 else(WIN32)
     # build shared libraries
     set(NG_LIB_TYPE SHARED)
diff --git a/cmake/SuperBuild.cmake b/cmake/SuperBuild.cmake
index 36ec058f..a04e4164 100644
--- a/cmake/SuperBuild.cmake
+++ b/cmake/SuperBuild.cmake
@@ -20,18 +20,6 @@ if(WIN32)
   set (OCC_DOWNLOAD_URL_WIN "${DEPS_DOWNLOAD_URL}/occ_win64.zip" CACHE STRING INTERNAL)
   set (TCLTK_DOWNLOAD_URL_WIN "${DEPS_DOWNLOAD_URL}/tcltk_win64.zip" CACHE STRING INTERNAL)
   set (ZLIB_DOWNLOAD_URL_WIN "${DEPS_DOWNLOAD_URL}/zlib_win64.zip" CACHE STRING INTERNAL)
-  if(NOT CMAKE_CXX_COMPILER_ID STREQUAL "Intel")
-    string(REGEX REPLACE "/W[0-4]" "/W0" CMAKE_CXX_FLAGS_NEW ${CMAKE_CXX_FLAGS})
-    set(CMAKE_CXX_FLAGS ${CMAKE_CXX_FLAGS_NEW} CACHE STRING "compile flags" FORCE)
-    string(REGEX REPLACE "/W[0-4]" "/W0" CMAKE_CXX_FLAGS_NEW ${CMAKE_CXX_FLAGS_RELEASE})
-    set(CMAKE_CXX_FLAGS_RELEASE ${CMAKE_CXX_FLAGS_NEW} CACHE STRING "compile flags" FORCE)
-
-    string(REGEX REPLACE "/W[0-4]" "/W0" CMAKE_SHARED_LINKER_FLAGS_NEW ${CMAKE_SHARED_LINKER_FLAGS})
-    set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS_NEW} /IGNORE:4217,4049" CACHE STRING "compile flags" FORCE)
-    string(REGEX REPLACE "/W[0-4]" "/W0" CMAKE_EXE_LINKER_FLAGS_NEW ${CMAKE_EXE_LINKER_FLAGS})
-    set(CMAKE_EXE_LINKER_FLAGS"${CMAKE_EXE_LINKER_FLAGS_NEW}/IGNORE:4217,4049" CACHE STRING "compile flags" FORCE)
-
-  endif(NOT CMAKE_CXX_COMPILER_ID STREQUAL "Intel")
 endif(WIN32)
 
 if(UNIX)
diff --git a/libsrc/core/CMakeLists.txt b/libsrc/core/CMakeLists.txt
index 5c58e7e6..cb5eb36c 100644
--- a/libsrc/core/CMakeLists.txt
+++ b/libsrc/core/CMakeLists.txt
@@ -23,21 +23,21 @@ if(USE_PYTHON)
   target_compile_definitions(ngcore PUBLIC NETGEN_PYTHON NG_PYTHON)
 endif(USE_PYTHON)
 
-target_compile_definitions(ngcore PRIVATE NGCORE_EXPORTS)
-if(NOT WIN32)
-  target_compile_options(ngcore PRIVATE -fvisibility=hidden)
-endif(NOT WIN32)
-
 if(WIN32)
-  target_compile_options(ngcore PUBLIC /bigobj)
+  target_compile_options(ngcore PUBLIC /bigobj /MP /W1 /wd4068)
+  get_WIN32_WINNT(ver)
+  target_compile_definitions(ngcore PUBLIC _WIN32_WINNT=${ver} WNT WNT_WINDOW NOMINMAX MSVC_EXPRESS _CRT_SECURE_NO_WARNINGS HAVE_STRUCT_TIMESPEC)
+  target_link_options(ngcore PUBLIC /ignore:4273 /ignore:4217 /ignore:4049)
+else(WIN32)
+  target_compile_options(ngcore PRIVATE -fvisibility=hidden)
 endif(WIN32)
 
-target_compile_definitions(ngcore PUBLIC $<$<CONFIG:DEBUG>:NETGEN_ENABLE_CHECK_RANGE>)
+target_compile_definitions(ngcore PRIVATE NGCORE_EXPORTS)
 target_include_directories(ngcore INTERFACE $<INSTALL_INTERFACE:${NG_INSTALL_DIR_INCLUDE}> $<INSTALL_INTERFACE:${NG_INSTALL_DIR_INCLUDE}/include>)
 
-if(CHECK_RANGE)
+if(CHECK_RANGE OR CMAKE_BUILD_TYPE STREQUAL "Debug" OR CMAKE_BUILD_TYPE STREQUAL "DEBUG")
   target_compile_definitions(ngcore PUBLIC NETGEN_ENABLE_CHECK_RANGE)
-endif(CHECK_RANGE)
+endif(CHECK_RANGE OR CMAKE_BUILD_TYPE STREQUAL "Debug" OR CMAKE_BUILD_TYPE STREQUAL "DEBUG")
 
 if(USE_SPDLOG)
   include_directories(${SPDLOG_INCLUDE_DIR})
diff --git a/libsrc/geom2d/CMakeLists.txt b/libsrc/geom2d/CMakeLists.txt
index ab292315..f496448d 100644
--- a/libsrc/geom2d/CMakeLists.txt
+++ b/libsrc/geom2d/CMakeLists.txt
@@ -11,8 +11,9 @@ endif(NOT WIN32)
 
 if(USE_GUI)
     add_library(geom2dvis ${NG_LIB_TYPE} vsgeom2d.cpp)
+    target_link_libraries(geom2dvis PUBLIC ngcore)
     if(NOT WIN32)
-        target_link_libraries(geom2dvis geom2d)
+        target_link_libraries(geom2dvis PUBLIC geom2d)
         install( TARGETS geom2dvis ${NG_INSTALL_DIR})
     endif(NOT WIN32)
 endif(USE_GUI)
diff --git a/libsrc/occ/CMakeLists.txt b/libsrc/occ/CMakeLists.txt
index 39da5a89..7e7a2a65 100644
--- a/libsrc/occ/CMakeLists.txt
+++ b/libsrc/occ/CMakeLists.txt
@@ -6,6 +6,7 @@ add_library(occ ${NG_LIB_TYPE}
         )
 if(USE_GUI)
         add_library(occvis ${NG_LIB_TYPE} vsocc.cpp)
+        target_link_libraries(occvis PUBLIC ngcore)
 endif(USE_GUI)
 
 target_link_libraries(occ PUBLIC ngcore PRIVATE netgen_python)