diff --git a/CMakeLists.txt b/CMakeLists.txt
index 3f9d19e..25d96ab 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -144,6 +144,9 @@ if(UNIX)
 endif()
 if(WIN32)
   set(_gRPC_PLATFORM_WINDOWS ON)
+  if(CMAKE_SYSTEM_NAME STREQUAL "WindowsStore")
+    set(_gRPC_PLATFORM_UWP ON)
+  endif()
 endif()
 
 set(CMAKE_POSITION_INDEPENDENT_CODE TRUE)
@@ -160,6 +163,9 @@ if(MSVC)
   set(_gRPC_C_CXX_FLAGS "${_gRPC_C_CXX_FLAGS} /wd4267")
   # TODO(jtattermusch): needed to build boringssl with VS2017, revisit later
   set(_gRPC_C_CXX_FLAGS "${_gRPC_C_CXX_FLAGS} /wd4987 /wd4774 /wd4819 /wd4996 /wd4619")
+  if(_gRPC_PLATFORM_UWP)
+    add_definitions(-DGRPC_ARES=0)
+  endif()
 endif()
 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${_gRPC_C_CXX_FLAGS}")
 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${_gRPC_C_CXX_FLAGS}")
@@ -228,6 +234,10 @@ file(MAKE_DIRECTORY ${_gRPC_PROTO_GENS_DIR})
 #     ``.proto`` files
 #
 function(protobuf_generate_grpc_cpp)
+  if(_gRPC_PLATFORM_UWP)
+    return()
+  endif()
+
   if(NOT ARGN)
     message(SEND_ERROR "Error: PROTOBUF_GENERATE_GRPC_CPP() called without any proto files")
     return()
@@ -300,6 +310,7 @@ if (gRPC_BUILD_GRPC_RUBY_PLUGIN)
   list(APPEND _gRPC_PLUGIN_LIST grpc_ruby_plugin)
 endif ()
 
+if(NOT _gRPC_PLATFORM_UWP)
 add_custom_target(plugins
   DEPENDS ${_gRPC_PLUGIN_LIST}
 )
@@ -321,6 +332,7 @@ add_custom_target(tools_cxx
 
 add_custom_target(tools
   DEPENDS tools_c tools_cxx)
+endif()
 
 protobuf_generate_grpc_cpp(
   src/proto/grpc/channelz/channelz.proto
diff --git a/src/core/lib/iomgr/resource_quota.cc b/src/core/lib/iomgr/resource_quota.cc
index 0fc0279..aaf2b09 100644
--- a/src/core/lib/iomgr/resource_quota.cc
+++ b/src/core/lib/iomgr/resource_quota.cc
@@ -945,7 +945,7 @@ bool grpc_resource_user_alloc(grpc_resource_user* resource_user, size_t size,
 void grpc_resource_user_free(grpc_resource_user* resource_user, size_t size) {
   gpr_mu_lock(&resource_user->mu);
   grpc_resource_quota* resource_quota = resource_user->resource_quota;
-  gpr_atm prior = gpr_atm_no_barrier_fetch_add(&resource_quota->used, -size);
+  gpr_atm prior = gpr_atm_no_barrier_fetch_add(&resource_quota->used, -static_cast<gpr_atm>(size));
   GPR_ASSERT(prior >= static_cast<long>(size));
   bool was_zero_or_negative = resource_user->free_pool <= 0;
   resource_user->free_pool += static_cast<int64_t>(size);
diff --git a/src/core/lib/security/credentials/alts/check_gcp_environment_windows.cc b/src/core/lib/security/credentials/alts/check_gcp_environment_windows.cc
index 59432cf..fed574d 100644
--- a/src/core/lib/security/credentials/alts/check_gcp_environment_windows.cc
+++ b/src/core/lib/security/credentials/alts/check_gcp_environment_windows.cc
@@ -39,6 +39,7 @@ bool check_bios_data(const char*) { return false; }
 bool check_windows_registry_product_name(HKEY root_key,
                                          const char* reg_key_path,
                                          const char* reg_key_name) {
+#if !defined(WINAPI_FAMILY) || WINAPI_FAMILY == WINAPI_FAMILY_DESKTOP_APP
   const size_t kProductNameBufferSize = 256;
   char const expected_substr[] = "Google";
 
@@ -71,6 +72,9 @@ bool check_windows_registry_product_name(HKEY root_key,
   }
 
   return strstr(buffer, expected_substr) != nullptr;
+#else
+  return false;
+#endif
 }
 
 }  // namespace internal