diff --git a/core/__init__.py b/core/__init__.py
index 84c4d9aa..2f876bdf 100644
--- a/core/__init__.py
+++ b/core/__init__.py
@@ -9,6 +9,7 @@ import re
 import subprocess
 import sys
 import time
+import typing
 
 import eol
 
@@ -32,16 +33,16 @@ APP_ROOT = SOURCE_ROOT.parent
 
 # init preliminaries
 SYS_ARGV = sys.argv[1:]
-APP_FILENAME = sys.argv[0]
-APP_NAME = os.path.basename(APP_FILENAME)
-LOG_DIR = os.path.join(APP_ROOT, 'logs')
-LOG_FILE = os.path.join(LOG_DIR, 'nzbtomedia.log')
-PID_FILE = os.path.join(LOG_DIR, 'nzbtomedia.pid')
-CONFIG_FILE = os.path.join(APP_ROOT, 'autoProcessMedia.cfg')
-CONFIG_SPEC_FILE = os.path.join(APP_ROOT, 'autoProcessMedia.cfg.spec')
-CONFIG_MOVIE_FILE = os.path.join(APP_ROOT, 'autoProcessMovie.cfg')
-CONFIG_TV_FILE = os.path.join(APP_ROOT, 'autoProcessTv.cfg')
-TEST_FILE = os.path.join(APP_ROOT, 'tests', 'test.mp4')
+APP_FILENAME = pathlib.Path(sys.argv[0])
+APP_NAME: str = APP_FILENAME.name
+LOG_DIR: pathlib.Path = APP_ROOT / 'logs'
+LOG_FILE: pathlib.Path = LOG_DIR / 'nzbtomedia.log'
+PID_FILE = LOG_DIR / 'nzbtomedia.pid'
+CONFIG_FILE = APP_ROOT / 'autoProcessMedia.cfg'
+CONFIG_SPEC_FILE = APP_ROOT / 'autoProcessMedia.cfg.spec'
+CONFIG_MOVIE_FILE = APP_ROOT / 'autoProcessMovie.cfg'
+CONFIG_TV_FILE = APP_ROOT / 'autoProcessTv.cfg'
+TEST_FILE = APP_ROOT / 'tests' / 'test.mp4'
 MYAPP = None
 
 from core import logger, main_db, version_check, databases, transcoder
@@ -91,6 +92,7 @@ TORRENT_CLIENTS = [
     'manual',
 ]
 
+
 # sickbeard fork/branch constants
 FORK_DEFAULT = 'default'
 FORK_FAILED = 'failed'
@@ -105,7 +107,7 @@ FORK_SICKGEAR = 'SickGear'
 FORK_SICKGEAR_API = 'SickGear-api'
 FORK_STHENO = 'Stheno'
 
-FORKS = {
+FORKS: typing.Mapping[str, typing.Mapping] = {
     FORK_DEFAULT: {'dir': None},
     FORK_FAILED: {'dirName': None, 'failed': None},
     FORK_FAILED_TORRENT: {'dir': None, 'failed': None, 'process_method': None},
@@ -201,7 +203,10 @@ ALL_FORKS = {
     for k in set(
         list(
             itertools.chain.from_iterable(
-                [FORKS[x].keys() for x in FORKS.keys()],
+                [
+                    FORKS[x].keys()
+                    for x in FORKS.keys()
+                ],
             ),
         ),
     )
@@ -250,7 +255,7 @@ TORRENT_CLIENT_AGENT = None
 TORRENT_CLASS = None
 USE_LINK = None
 OUTPUT_DIRECTORY = None
-NOFLATTEN = []
+NOFLATTEN: list[str] = []
 DELETE_ORIGINAL = None
 TORRENT_CHMOD_DIRECTORY = None
 TORRENT_DEFAULT_DIRECTORY = None
@@ -287,17 +292,17 @@ PLEX_SSL = None
 PLEX_HOST = None
 PLEX_PORT = None
 PLEX_TOKEN = None
-PLEX_SECTION = []
+PLEX_SECTION: list[str] = []
 
-EXT_CONTAINER = []
+EXT_CONTAINER: list[str] = []
 COMPRESSED_CONTAINER = []
 MEDIA_CONTAINER = []
 AUDIO_CONTAINER = []
 META_CONTAINER = []
 
-SECTIONS = []
-CATEGORIES = []
-FORK_SET = []
+SECTIONS: list[str] = []
+CATEGORIES: list[str] = []
+FORK_SET: list[str] = []
 
 MOUNTED = None
 GETSUBS = False
diff --git a/core/auto_process/books.py b/core/auto_process/books.py
index dbf26802..0daa49b3 100644
--- a/core/auto_process/books.py
+++ b/core/auto_process/books.py
@@ -38,13 +38,14 @@ def process(
     dir_name: str,
     input_name: str = '',
     status: int = 0,
-    failed: bool = False,
     client_agent: str = 'manual',
     download_id: str = '',
     input_category: str = '',
     failure_link: str = '',
 ) -> ProcessResult:
     # Get configuration
+    if core.CFG is None:
+        raise RuntimeError('Configuration not loaded.')
     cfg = core.CFG[section][input_category]
 
     # Base URL
diff --git a/core/auto_process/comics.py b/core/auto_process/comics.py
index 1743c698..e8cb4e6b 100644
--- a/core/auto_process/comics.py
+++ b/core/auto_process/comics.py
@@ -38,13 +38,14 @@ def process(
     dir_name: str,
     input_name: str = '',
     status: int = 0,
-    failed: bool = False,
     client_agent: str = 'manual',
     download_id: str = '',
     input_category: str = '',
     failure_link: str = '',
 ) -> ProcessResult:
     # Get configuration
+    if core.CFG is None:
+        raise RuntimeError('Configuration not loaded.')
     cfg = core.CFG[section][input_category]
 
     # Base URL
@@ -113,10 +114,7 @@ def process(
             f'{r.status_code}',
         )
 
-    result = r.text
-    if not type(result) == list:
-        result = result.split('\n')
-    for line in result:
+    for line in r.text.split('\n'):
         if line:
             logger.postprocess(line, section)
         if 'Post Processing SUCCESSFUL' in line:
diff --git a/core/auto_process/games.py b/core/auto_process/games.py
index e13c3fdf..0a197358 100644
--- a/core/auto_process/games.py
+++ b/core/auto_process/games.py
@@ -38,13 +38,14 @@ def process(
     dir_name: str,
     input_name: str = '',
     status: int = 0,
-    failed: bool = False,
     client_agent: str = 'manual',
     download_id: str = '',
     input_category: str = '',
     failure_link: str = '',
 ) -> ProcessResult:
     # Get configuration
+    if core.CFG is None:
+        raise RuntimeError('Configuration not loaded.')
     cfg = core.CFG[section][input_category]
 
     # Base URL
diff --git a/core/auto_process/movies.py b/core/auto_process/movies.py
index 0755f591..0acece69 100644
--- a/core/auto_process/movies.py
+++ b/core/auto_process/movies.py
@@ -32,22 +32,20 @@ from core.utils.paths import remove_dir
 from core.utils.network import server_responding
 
 
-requests.packages.urllib3.disable_warnings()
-
-
 def process(
     *,
     section: str,
     dir_name: str,
     input_name: str = '',
     status: int = 0,
-    failed: bool = False,
     client_agent: str = 'manual',
     download_id: str = '',
     input_category: str = '',
     failure_link: str = '',
 ) -> ProcessResult:
     # Get configuration
+    if core.CFG is None:
+        raise RuntimeError('Configuration not loaded.')
     cfg = core.CFG[section][input_category]
 
     # Base URL
@@ -389,7 +387,7 @@ def process(
                 scan_id = None
         elif section == 'Watcher3' and result['status'] == 'finished':
             update_movie_status = result['tasks']['update_movie_status']
-            logger.postprocess('Watcher3 updated status to {}'.format())
+            logger.postprocess(f'Watcher3 updated status to {section}')
             if update_movie_status == 'Finished':
                 return ProcessResult(
                     message=f'{section}: Successfully post-processed {input_name}',
@@ -578,11 +576,11 @@ def process(
                 f'{section} will keep searching',
             )
 
-    # Added a release that was not in the wanted list so confirm rename successful by finding this movie media.list.
+    # Added a release that was not in the wanted list so confirm rename
+    # successful by finding this movie media.list.
     if not release:
-        download_id = (
-            None  # we don't want to filter new releases based on this.
-        )
+        # we don't want to filter new releases based on this.
+        download_id = ''
 
     if no_status_check:
         return ProcessResult.success(
diff --git a/core/auto_process/music.py b/core/auto_process/music.py
index 2e9c7170..bce5f0bc 100644
--- a/core/auto_process/music.py
+++ b/core/auto_process/music.py
@@ -38,13 +38,14 @@ def process(
     dir_name: str,
     input_name: str = '',
     status: int = 0,
-    failed: bool = False,
     client_agent: str = 'manual',
     download_id: str = '',
     input_category: str = '',
     failure_link: str = '',
 ) -> ProcessResult:
     # Get configuration
+    if core.CFG is None:
+        raise RuntimeError('Configuration not loaded.')
     cfg = core.CFG[section][input_category]
 
     # Base URL
@@ -158,12 +159,11 @@ def process(
         else:
             logger.debug(f'path: {dir_name}', section)
             data = {'name': 'Rename', 'path': dir_name}
-        data = json.dumps(data)
         try:
             logger.debug(f'Opening URL: {url} with data: {data}', section)
             r = requests.post(
                 url,
-                data=data,
+                data=json.dumps(data),
                 headers=headers,
                 stream=True,
                 verify=False,
@@ -261,6 +261,8 @@ def process(
                 f'support failed downloads',
             )
 
+    return ProcessResult.failure()
+
 
 def get_status(url, apikey, dir_name):
     logger.debug(
diff --git a/core/auto_process/tv.py b/core/auto_process/tv.py
index 8e1cd500..d2a88e6d 100644
--- a/core/auto_process/tv.py
+++ b/core/auto_process/tv.py
@@ -38,13 +38,14 @@ def process(
     dir_name: str,
     input_name: str = '',
     status: int = 0,
-    failed: bool = False,
     client_agent: str = 'manual',
     download_id: str = '',
     input_category: str = '',
     failure_link: str = '',
 ) -> ProcessResult:
     # Get configuration
+    if core.CFG is None:
+        raise RuntimeError('Configuration not loaded.')
     cfg = core.CFG[section][input_category]
 
     # Base URL
@@ -79,7 +80,6 @@ def process(
     force = int(cfg.get('force', 0))
     delete_on = int(cfg.get('delete_on', 0))
     ignore_subs = int(cfg.get('ignore_subs', 0))
-    status = int(failed)
 
     # Begin processing
 
@@ -185,11 +185,9 @@ def process(
         if valid_files == num_files and not status == 0:
             logger.info('Found Valid Videos. Setting status Success')
             status = 0
-            failed = 0
         if valid_files < num_files and status == 0:
             logger.info('Found corrupt videos. Setting status Failed')
             status = 1
-            failed = 1
             if (
                 'NZBOP_VERSION' in os.environ
                 and os.environ['NZBOP_VERSION'][0:5] >= '14.0'
@@ -220,23 +218,19 @@ def process(
         logger.info(
             'Check for media files ignored because nzbExtractionBy is set to Destination.',
         )
-        if int(failed) == 0:
+        if status == 0:
             logger.info('Setting Status Success.')
-            status = 0
-            failed = 0
         else:
             logger.info(
                 'Downloader reported an error during download or verification. Processing this as a failed download.',
             )
             status = 1
-            failed = 1
     else:
         logger.warning(
             f'No media files found in directory {dir_name}. Processing this as a failed download',
             section,
         )
         status = 1
-        failed = 1
         if (
             'NZBOP_VERSION' in os.environ
             and os.environ['NZBOP_VERSION'][0:5] >= '14.0'
@@ -275,7 +269,7 @@ def process(
     # Part of the refactor
     if init_sickbeard.fork_obj:
         init_sickbeard.fork_obj.initialize(
-            dir_name, input_name, failed, client_agent='manual',
+            dir_name, input_name, status, client_agent='manual',
         )
 
     # configure SB params to pass
@@ -289,9 +283,9 @@ def process(
 
         for param in copy.copy(fork_params):
             if param == 'failed':
-                if failed > 1:
-                    failed = 1
-                fork_params[param] = failed
+                if status > 1:
+                    status = 1
+                fork_params[param] = status
                 if 'proc_type' in fork_params:
                     del fork_params['proc_type']
                 if 'type' in fork_params:
@@ -437,7 +431,6 @@ def process(
             }
         if not download_id:
             data.pop('downloadClientId')
-        data = json.dumps(data)
     url = core.utils.common.create_url(scheme, host, port, route)
     try:
         if section == 'SickBeard':
@@ -517,7 +510,7 @@ def process(
             logger.debug(f'Opening URL: {url} with data: {data}', section)
             r = requests.post(
                 url,
-                data=data,
+                data=json.dumps(data),
                 headers=headers,
                 stream=True,
                 verify=False,
diff --git a/core/configuration.py b/core/configuration.py
index 2f709f05..66a1562c 100644
--- a/core/configuration.py
+++ b/core/configuration.py
@@ -90,10 +90,10 @@ class Section(configobj.Section):
 
 
 class ConfigObj(configobj.ConfigObj, Section):
-    def __init__(self, *args, **kw):
-        if len(args) == 0:
-            args = (core.CONFIG_FILE,)
-        super().__init__(*args, **kw)
+    def __init__(self, infile=None, *args, **kw):
+        if infile is None:
+            infile = core.CONFIG_FILE
+        super().__init__(os.fspath(infile), *args, **kw)
         self.interpolation = False
 
     @staticmethod
@@ -115,7 +115,7 @@ class ConfigObj(configobj.ConfigObj, Section):
 
         try:
             # check for autoProcessMedia.cfg and create if it does not exist
-            if not os.path.isfile(core.CONFIG_FILE):
+            if not core.CONFIG_FILE.is_file():
                 shutil.copyfile(core.CONFIG_SPEC_FILE, core.CONFIG_FILE)
             CFG_OLD = config(core.CONFIG_FILE)
         except Exception as error:
@@ -123,7 +123,7 @@ class ConfigObj(configobj.ConfigObj, Section):
 
         try:
             # check for autoProcessMedia.cfg.spec and create if it does not exist
-            if not os.path.isfile(core.CONFIG_SPEC_FILE):
+            if not core.CONFIG_SPEC_FILE.is_file():
                 shutil.copyfile(core.CONFIG_FILE, core.CONFIG_SPEC_FILE)
             CFG_NEW = config(core.CONFIG_SPEC_FILE)
         except Exception as error:
diff --git a/core/transcoder.py b/core/transcoder.py
index f754e61b..660148e9 100644
--- a/core/transcoder.py
+++ b/core/transcoder.py
@@ -3,6 +3,7 @@ from __future__ import annotations
 import errno
 import json
 import os
+import pathlib
 import platform
 import re
 import shutil
@@ -19,9 +20,8 @@ from core.utils.paths import make_dir
 __author__ = 'Justin'
 
 
-def is_video_good(videofile, status, require_lan=None):
-    file_name_ext = os.path.basename(videofile)
-    file_name, file_ext = os.path.splitext(file_name_ext)
+def is_video_good(video: pathlib.Path, status, require_lan=None):
+    file_ext = video.suffix
     disable = False
     if (
         file_ext not in core.MEDIA_CONTAINER
@@ -57,26 +57,26 @@ def is_video_good(videofile, status, require_lan=None):
                     'TRANSCODER',
                 )
     if disable:
-        if (
-            status
-        ):  # if the download was 'failed', assume bad. If it was successful, assume good.
+        if status:
+            # if the download was 'failed', assume bad.
+            # If it was successful, assume good.
             return False
         else:
             return True
 
     logger.info(
-        f'Checking [{file_name_ext}] for corruption, please stand by ...',
+        f'Checking [{video.name}] for corruption, please stand by ...',
         'TRANSCODER',
     )
-    video_details, result = get_video_details(videofile)
+    video_details, result = get_video_details(video)
 
     if result != 0:
-        logger.error(f'FAILED: [{file_name_ext}] is corrupted!', 'TRANSCODER')
+        logger.error(f'FAILED: [{video.name}] is corrupted!', 'TRANSCODER')
         return False
     if video_details.get('error'):
         error_details = video_details.get('error')
         logger.info(
-            f'FAILED: [{file_name_ext}] returned error [{error_details}].',
+            f'FAILED: [{video.name}] returned error [{error_details}].',
             'TRANSCODER',
         )
         return False
@@ -103,12 +103,12 @@ def is_video_good(videofile, status, require_lan=None):
             valid_audio = audio_streams
         if len(video_streams) > 0 and len(valid_audio) > 0:
             logger.info(
-                f'SUCCESS: [{file_name_ext}] has no corruption.', 'TRANSCODER',
+                f'SUCCESS: [{video.name}] has no corruption.', 'TRANSCODER',
             )
             return True
         else:
             logger.info(
-                f'FAILED: [{file_name_ext}] has {len(video_streams)} video streams and {len(audio_streams)} audio streams. Assume corruption.',
+                f'FAILED: [{video.name}] has {len(video_streams)} video streams and {len(audio_streams)} audio streams. Assume corruption.',
                 'TRANSCODER',
             )
             return False
diff --git a/core/utils/files.py b/core/utils/files.py
index ffc11a16..958dd263 100644
--- a/core/utils/files.py
+++ b/core/utils/files.py
@@ -277,9 +277,7 @@ def backup_versioned_file(old_file, version):
 
         try:
             logger.log(
-                'Trying to back up {old} to {new]'.format(
-                    old=old_file, new=new_file,
-                ),
+                f'Trying to back up {old_file} to {new_file}',
                 logger.DEBUG,
             )
             shutil.copy(old_file, new_file)
diff --git a/core/utils/processes.py b/core/utils/processes.py
index 92beb40e..a1ac0898 100644
--- a/core/utils/processes.py
+++ b/core/utils/processes.py
@@ -4,6 +4,7 @@ import os
 import socket
 import subprocess
 import sys
+import typing
 
 import core
 from core import APP_FILENAME
@@ -20,9 +21,9 @@ if os.name == 'nt':
 class WindowsProcess:
     def __init__(self):
         self.mutex = None
-        self.mutexname = 'nzbtomedia_{pid}'.format(
-            pid=core.PID_FILE.replace('\\', '/'),
-        )  # {D0E858DF-985E-4907-B7FB-8D732C3FC3B9}'
+        # {D0E858DF-985E-4907-B7FB-8D732C3FC3B9}
+        _path_str = os.fspath(core.PID_FILE).replace('\\', '/')
+        self.mutexname = f'nzbtomedia_{_path_str}'
         self.CreateMutex = CreateMutex
         self.CloseHandle = CloseHandle
         self.GetLastError = GetLastError
@@ -79,25 +80,21 @@ class PosixProcess:
 
         if not self.lasterror:
             # Write my pid into pidFile to keep multiple copies of program from running
-            try:
-                fp = open(self.pidpath, 'w')
-                fp.write(str(os.getpid()))
-                fp.close()
-            except Exception:
-                pass
-
+            with self.pidpath.open(mode='w') as fp:
+                fp.write(os.getpid())
         return self.lasterror
 
     def __del__(self):
         if not self.lasterror:
             if self.lock_socket:
                 self.lock_socket.close()
-            if os.path.isfile(self.pidpath):
-                os.unlink(self.pidpath)
+            if self.pidpath.is_file():
+                self.pidpath.unlink()
 
 
+ProcessType = typing.Type[typing.Union[PosixProcess, WindowsProcess]]
 if os.name == 'nt':
-    RunningProcess = WindowsProcess
+    RunningProcess: ProcessType = WindowsProcess
 else:
     RunningProcess = PosixProcess