diff --git a/CMakeLists.txt b/CMakeLists.txt
index 42067c1a..75ada748 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -26,9 +26,9 @@ set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} ${PROJECT_SOURCE_DIR}/CMakeModules)
 
 # Compiler flags
 if (MSVC)
-    add_compile_options(/W3
+    add_compile_options(/W4
                         /w34263 # Non-virtual member function hides base class virtual function
-                        /w34265 # Class has virtual functions, but destructor is not virtual
+                        /w44265 # Class has virtual functions, but destructor is not virtual
                         /w34456 # Declaration of 'var' hides previous local declaration
                         /w34457 # Declaration of 'var' hides function parameter
                         /w34458 # Declaration of 'var' hides class member
diff --git a/src/backend_x64/hostloc.h b/src/backend_x64/hostloc.h
index 97e09f52..d29c73a7 100644
--- a/src/backend_x64/hostloc.h
+++ b/src/backend_x64/hostloc.h
@@ -54,6 +54,7 @@ using HostLocList = std::initializer_list<HostLoc>;
 
 // RSP is preserved for function calls
 // R15 contains the JitState pointer
+#pragma warning (suppress : 4592) // Symbol will be dynamically initialized (implementation limitation)
 const HostLocList any_gpr = {
     HostLoc::RAX,
     HostLoc::RBX,
@@ -71,6 +72,7 @@ const HostLocList any_gpr = {
     HostLoc::R14,
 };
 
+#pragma warning (suppress : 4592) // Symbol will be dynamically initialized (implementation limitation)
 const HostLocList any_xmm = {
     HostLoc::XMM0,
     HostLoc::XMM1,
diff --git a/src/backend_x64/jitstate.h b/src/backend_x64/jitstate.h
index 1dc11b02..d3bd7039 100644
--- a/src/backend_x64/jitstate.h
+++ b/src/backend_x64/jitstate.h
@@ -24,6 +24,7 @@ struct JitState {
     std::array<u32, 16> Reg{}; // Current register file.
     // TODO: Mode-specific register sets unimplemented.
 
+    #pragma warning (suppress : 4324) // Structure was padded due to alignment specifier
     alignas(u64) std::array<u32, 64> ExtReg{}; // Extension registers.
 
     std::array<u64, SpillCount> Spill{}; // Spill.
diff --git a/tests/skyeye_interpreter/dyncom/arm_dyncom_interpreter.cpp b/tests/skyeye_interpreter/dyncom/arm_dyncom_interpreter.cpp
index 732d1ddf..e630162d 100644
--- a/tests/skyeye_interpreter/dyncom/arm_dyncom_interpreter.cpp
+++ b/tests/skyeye_interpreter/dyncom/arm_dyncom_interpreter.cpp
@@ -4,6 +4,8 @@
 
 #define CITRA_IGNORE_EXIT(x)
 
+#pragma warning(disable : 4244)
+
 #include <algorithm>
 #include <cstdio>
 
diff --git a/tests/skyeye_interpreter/skyeye_common/armstate.cpp b/tests/skyeye_interpreter/skyeye_common/armstate.cpp
index 3c7678de..d4f6d445 100644
--- a/tests/skyeye_interpreter/skyeye_common/armstate.cpp
+++ b/tests/skyeye_interpreter/skyeye_common/armstate.cpp
@@ -2,6 +2,8 @@
 // Licensed under GPLv2 or any later version
 // Refer to the license.txt file included.
 
+#pragma warning(disable : 4244)
+
 #include <algorithm>
 #include "common/assert.h"
 #include "skyeye_interpreter/skyeye_common/armstate.h"
diff --git a/tests/skyeye_interpreter/skyeye_common/vfp/vfp.cpp b/tests/skyeye_interpreter/skyeye_common/vfp/vfp.cpp
index 8b9fbcbe..11486438 100644
--- a/tests/skyeye_interpreter/skyeye_common/vfp/vfp.cpp
+++ b/tests/skyeye_interpreter/skyeye_common/vfp/vfp.cpp
@@ -20,6 +20,8 @@
 
 /* Note: this file handles interface with arm core and vfp registers */
 
+#pragma warning(disable : 4100)
+
 #include "common/assert.h"
 //#include "common/common_funcs.h"
 #include "common/common_types.h"
diff --git a/tests/skyeye_interpreter/skyeye_common/vfp/vfpdouble.cpp b/tests/skyeye_interpreter/skyeye_common/vfp/vfpdouble.cpp
index 03979b2d..eb196cb6 100644
--- a/tests/skyeye_interpreter/skyeye_common/vfp/vfpdouble.cpp
+++ b/tests/skyeye_interpreter/skyeye_common/vfp/vfpdouble.cpp
@@ -51,6 +51,8 @@
  * ===========================================================================
  */
 
+#pragma warning(disable : 4100 4244 4245)
+
 #include <algorithm>
 //#include "common/logging/log.h"
 #include "skyeye_interpreter/skyeye_common/vfp/vfp.h"
diff --git a/tests/skyeye_interpreter/skyeye_common/vfp/vfpsingle.cpp b/tests/skyeye_interpreter/skyeye_common/vfp/vfpsingle.cpp
index 03a881df..db6c7aac 100644
--- a/tests/skyeye_interpreter/skyeye_common/vfp/vfpsingle.cpp
+++ b/tests/skyeye_interpreter/skyeye_common/vfp/vfpsingle.cpp
@@ -51,6 +51,8 @@
  * ===========================================================================
  */
 
+#pragma warning(disable : 4100 4244 4245)
+
 #include <algorithm>
 #include <cinttypes>
 #include <common/assert.h>