diff --git a/torchbenchmark/__init__.py b/torchbenchmark/__init__.py
index b07c121a48..164bfa3cc3 100644
--- a/torchbenchmark/__init__.py
+++ b/torchbenchmark/__init__.py
@@ -59,7 +59,7 @@ def _install_deps(model_path: str, verbose: bool = True) -> Tuple[bool, Any]:
         [sys.executable, install_file],
     ]
     run_env = os.environ.copy()
-    run_env["PYTHONPATH"] = this_dir.parent
+    run_env["PYTHONPATH"] = Path(this_dir.parent).as_posix()
     run_kwargs = {
         "cwd": model_path,
         "check": True,
@@ -67,7 +67,7 @@ def _install_deps(model_path: str, verbose: bool = True) -> Tuple[bool, Any]:
     }
 
     output_buffer = None
-    _, stdout_fpath = tempfile.mkstemp()
+    fd, stdout_fpath = tempfile.mkstemp()
 
     try:
         output_buffer = io.FileIO(stdout_fpath, mode="w")
@@ -89,7 +89,9 @@ def _install_deps(model_path: str, verbose: bool = True) -> Tuple[bool, Any]:
     except Exception as e:
         return (False, e, io.FileIO(stdout_fpath, mode="r").read().decode())
     finally:
+        output_buffer.close()
         del output_buffer
+        os.close(fd)
         os.remove(stdout_fpath)
 
     return (True, None, None)
diff --git a/torchbenchmark/models/fastNLP_Bert/cmrc2018_simulator.py b/torchbenchmark/models/fastNLP_Bert/cmrc2018_simulator.py
index 62ef9ef44a..a34b72a550 100644
--- a/torchbenchmark/models/fastNLP_Bert/cmrc2018_simulator.py
+++ b/torchbenchmark/models/fastNLP_Bert/cmrc2018_simulator.py
@@ -108,7 +108,7 @@ def _generate_train(batch_size):
 def _generate_vocab():
     never_split = ["[UNK]", "[SEP]", "[PAD]", "[CLS]", "[MASK]"]
     VOCAB_SET.update(never_split)
-    with open(CMRC2018_VOCAB_SIM, "w") as vf:
+    with open(CMRC2018_VOCAB_SIM, "w", encoding='utf-8') as vf:
         vf.write("\n".join(list(VOCAB_SET)))
 
 def _copy_bert_config():
diff --git a/torchbenchmark/models/sam/install.py b/torchbenchmark/models/sam/install.py
index 0646de166e..7c94fa7bae 100644
--- a/torchbenchmark/models/sam/install.py
+++ b/torchbenchmark/models/sam/install.py
@@ -1,15 +1,30 @@
 import os
 import subprocess
 import sys
+import requests
+
+def download(uri):
+    directory = '.data'
+    filename = os.path.basename(uri)  # Extracts the filename from the URI
+    filepath = os.path.join(directory, filename)
+    os.makedirs(directory, exist_ok=True)
+    response = requests.get(uri, stream=True)
+    if response.status_code == 200:
+        with open(filepath, 'wb') as f:
+            for chunk in response.iter_content(chunk_size=8192):  # Define the chunk size to be used
+                f.write(chunk)
+    else:
+        print(f'Failed to download file with status code {response.status_code}')
+
 
 def pip_install_requirements():
     subprocess.check_call([sys.executable, '-m', 'pip', 'install', '-q', '-r', 'requirements.txt'])
 
 def download_checkpoint():
-    subprocess.check_call(['wget', '-P', '.data', 'https://dl.fbaipublicfiles.com/segment_anything/sam_vit_h_4b8939.pth'])
+    download('https://dl.fbaipublicfiles.com/segment_anything/sam_vit_h_4b8939.pth')
 
 def download_data():
-    subprocess.check_call(['wget', '-P', '.data', 'https://github.com/facebookresearch/segment-anything/raw/main/notebooks/images/truck.jpg'])
+    download('https://github.com/facebookresearch/segment-anything/raw/main/notebooks/images/truck.jpg')
 
 if __name__ == '__main__':
     pip_install_requirements()
diff --git a/torchbenchmark/models/sam_fast/install.py b/torchbenchmark/models/sam_fast/install.py
index 0646de166e..7c94fa7bae 100644
--- a/torchbenchmark/models/sam_fast/install.py
+++ b/torchbenchmark/models/sam_fast/install.py
@@ -1,15 +1,30 @@
 import os
 import subprocess
 import sys
+import requests
+
+def download(uri):
+    directory = '.data'
+    filename = os.path.basename(uri)  # Extracts the filename from the URI
+    filepath = os.path.join(directory, filename)
+    os.makedirs(directory, exist_ok=True)
+    response = requests.get(uri, stream=True)
+    if response.status_code == 200:
+        with open(filepath, 'wb') as f:
+            for chunk in response.iter_content(chunk_size=8192):  # Define the chunk size to be used
+                f.write(chunk)
+    else:
+        print(f'Failed to download file with status code {response.status_code}')
+
 
 def pip_install_requirements():
     subprocess.check_call([sys.executable, '-m', 'pip', 'install', '-q', '-r', 'requirements.txt'])
 
 def download_checkpoint():
-    subprocess.check_call(['wget', '-P', '.data', 'https://dl.fbaipublicfiles.com/segment_anything/sam_vit_h_4b8939.pth'])
+    download('https://dl.fbaipublicfiles.com/segment_anything/sam_vit_h_4b8939.pth')
 
 def download_data():
-    subprocess.check_call(['wget', '-P', '.data', 'https://github.com/facebookresearch/segment-anything/raw/main/notebooks/images/truck.jpg'])
+    download('https://github.com/facebookresearch/segment-anything/raw/main/notebooks/images/truck.jpg')
 
 if __name__ == '__main__':
     pip_install_requirements()
diff --git a/torchbenchmark/models/torch_multimodal_clip/install.py b/torchbenchmark/models/torch_multimodal_clip/install.py
index 647fb28094..0723509634 100644
--- a/torchbenchmark/models/torch_multimodal_clip/install.py
+++ b/torchbenchmark/models/torch_multimodal_clip/install.py
@@ -1,13 +1,24 @@
 import os
 import subprocess
 import sys
+import requests
+
+def download(output_filename, uri):
+    # Download the file with streaming to handle large files
+    response = requests.get(uri, stream=True)
+    if response.status_code == 200:
+        with open(output_filename, 'wb') as f:
+            for chunk in response.iter_content(chunk_size=8192):  # Define the chunk size to be used
+                f.write(chunk)
+    else:
+        print(f'Failed to download file with status code {response.status_code}')
 
 def pip_install_requirements():
     subprocess.check_call([sys.executable, '-m', 'pip', 'install', '-q', '-r', 'requirements.txt'])
 
 def download_data(data_folder):
     # CC-0 image from wikipedia page on pizza so legal to use
-    subprocess.check_call(['wget', '-O', os.path.join(data_folder, 'pizza.jpg'), 'https://upload.wikimedia.org/wikipedia/commons/thumb/9/91/Pizza-3007395.jpg/2880px-Pizza-3007395.jpg'])
+    download(os.path.join(data_folder, 'pizza.jpg'), 'https://upload.wikimedia.org/wikipedia/commons/thumb/9/91/Pizza-3007395.jpg/2880px-Pizza-3007395.jpg')
 
 if __name__ == '__main__':
     pip_install_requirements()