diff --git a/python/jittor/__init__.py b/python/jittor/__init__.py
index e54bcf7e..772a95f4 100644
--- a/python/jittor/__init__.py
+++ b/python/jittor/__init__.py
@@ -9,7 +9,7 @@
 # file 'LICENSE.txt', which is part of this source code package.
 # ***************************************************************
 
-__version__ = '1.3.0.4'
+__version__ = '1.3.0.5'
 from jittor_utils import lock
 with lock.lock_scope():
     ori_int = int
diff --git a/python/jittor/compile_extern.py b/python/jittor/compile_extern.py
index 16d9e2cc..660a0a92 100644
--- a/python/jittor/compile_extern.py
+++ b/python/jittor/compile_extern.py
@@ -75,9 +75,8 @@ def install_mkl(root_folder):
             # this env is used for execute example/text
             bin_path = os.path.join(dirname, "bin")
             sys.path.append(bin_path)
-            os.add_dll_directory(bin_path)
             os.environ["PATH"] = os.environ.get("PATH", "") + ";" + bin_path
-            cmd = f"cd /d {dirname}/examples && {cc_path} {dirname}/examples/cnn_inference_f32.cpp -I{dirname}/include -Fe: {dirname}/examples/test {fix_cl_flags(cc_flags)} {dirname}/lib/mkldnn.lib"
+            cmd = f"cd /d {dirname}/examples && {cc_path} {dirname}/examples/cnn_inference_f32.cpp -I{dirname}/include -Fe: {dirname}/examples/test.exe {fix_cl_flags(cc_flags).replace('-LD', '')} {dirname}/lib/mkldnn.lib"
             
             assert 0 == os.system(cmd)
             assert 0 == os.system(f"{dirname}/examples/test")
@@ -130,8 +129,7 @@ def setup_mkl():
         if os.name == 'nt':
             mkl_lib_name = os.path.join(mkl_home, 'bin', 'dnnl.dll')
             mkl_bin_path = os.path.join(mkl_home, 'bin')
-            os.add_dll_directory(mkl_bin_path)
-            extra_flags = f" -I\"{mkl_include_path}\"  -L\"{mkl_lib_path}\" -ldnnl "
+            extra_flags = f" -I\"{mkl_include_path}\"  -L\"{mkl_lib_path}\" -L\"{mkl_bin_path}\" -ldnnl "
         assert os.path.isdir(mkl_include_path)
         assert os.path.isdir(mkl_lib_path)
         assert os.path.isfile(mkl_lib_name)
@@ -374,8 +372,6 @@ def setup_cutt():
     LOG.v(f"cutt_lib_path: {cutt_lib_path}")
     LOG.v(f"cutt_lib_name: {cutt_lib_name}")
     # We do not link manualy, link in custom ops
-    if os.name == "nt":
-        os.add_dll_directory(cutt_lib_path)
     ctypes.CDLL(cutt_lib_name, dlopen_flags)
 
     cutt_op_dir = os.path.join(jittor_path, "extern", "cuda", "cutt", "ops")
diff --git a/python/jittor/compiler.py b/python/jittor/compiler.py
index d9a7d8b1..362f5e32 100644
--- a/python/jittor/compiler.py
+++ b/python/jittor/compiler.py
@@ -847,7 +847,6 @@ def check_cuda():
         # cc_flags += f" \"{cuda_lib}\\cudart.lib\" "
         cuda_lib_path = glob.glob(cuda_bin+"/cudart64*")[0]
         cc_flags += f" -lcudart -L\"{cuda_lib}\" "
-        os.add_dll_directory(cuda_dir)
         dll = ctypes.CDLL(cuda_lib_path, dlopen_flags)
         ret = dll.cudaDeviceSynchronize()
         assert ret == 0
@@ -1051,6 +1050,7 @@ if os.name == 'nt':
                 os.path.dirname(sys.executable),
                 "libs",
         )
+        cc_flags = remove_flags(cc_flags, ["-f", "-m"])
         cc_flags = cc_flags.replace("-std=c++14", "-std=c++17")
         cc_flags = cc_flags.replace("-lstdc++", "")
         cc_flags = cc_flags.replace("-ldl", "")
@@ -1061,6 +1061,7 @@ if os.name == 'nt':
             mp = jittor_utils.msvc_path
             cc_flags += f' -nologo -I"{mp}\\VC\\include" -I"{mp}\\win10_kits\\include\\ucrt" -I"{mp}\\win10_kits\\include\\shared" -I"{mp}\\win10_kits\\include\\um" -DNOMINMAX '
             cc_flags += f' -L"{mp}\\VC\\lib" -L"{mp}\\win10_kits\\lib\\um\\x64" -L"{mp}\\win10_kits\\lib\\ucrt\\x64" '
+        win_libpaths = {}
         def fix_cl_flags(cmd):
             cmd = cmd.replace(".o ", ".obj ")
             cmd = cmd.replace(".o\" ", ".obj\" ")
@@ -1087,6 +1088,10 @@ if os.name == 'nt':
                 elif f.startswith("-LD"):
                     output.append(f)
                 elif f.startswith("-L"):
+                    path = f[2:].replace("\"", "")
+                    if path not in win_libpaths:
+                        win_libpaths[path] = 1
+                        os.add_dll_directory(path)
                     output2.append("-LIBPATH:"+f[2:])
                 elif ".lib" in f:
                     output2.append(f)
@@ -1141,7 +1146,7 @@ if has_cuda:
         # nvcc don't support -Wall option
         if os.name == 'nt':
             nvcc_flags = nvcc_flags.replace("-fp:", "-Xcompiler -fp:")
-            nvcc_flags = nvcc_flags.replace("-EHa", "-Xcompiler -EHa")
+            nvcc_flags = nvcc_flags.replace("-EH", "-Xcompiler -EH")
             nvcc_flags = nvcc_flags.replace("-M", "-Xcompiler -M")
             nvcc_flags = nvcc_flags.replace("-nologo", "")
             nvcc_flags = nvcc_flags.replace("-std:", "-std=")
diff --git a/python/jittor_utils/__init__.py b/python/jittor_utils/__init__.py
index 52b2f4c4..48d75fef 100644
--- a/python/jittor_utils/__init__.py
+++ b/python/jittor_utils/__init__.py
@@ -376,6 +376,7 @@ def get_py3_include_path():
     
     if os.name == 'nt':
         # Windows
+        sys.executable = sys.executable.lower()
         _py3_include_path = '-I"' + os.path.join(
             os.path.dirname(sys.executable),
             "include"