diff --git a/oml/fulltext.py b/oml/fulltext.py
index d1cd5ee..d7d6d3e 100644
--- a/oml/fulltext.py
+++ b/oml/fulltext.py
@@ -7,30 +7,15 @@ from sqlalchemy.sql import operators
 
 logger = logging.getLogger(__name__)
 
-
-def get_prefix():
-    import settings
-    return os.path.join(os.path.expanduser(settings.preferences['libraryPath']), 'Books/')
-
-def get_ids(books):
-    from item.models import File
-    ids = [b[0] for b in File.query.filter(operators.in_op(File.path, books)).values('sha1')]
-    return ids
-
 def find_fulltext_macos(query):
-    prefix = get_prefix()
+    import settings
+    from item.models import File
+    prefix = os.path.join(os.path.expanduser(settings.preferences['libraryPath']), 'Books/')
     cmd = ["mdfind", "-onlyin", prefix, query]
     books = subprocess.check_output(cmd).decode().strip().split('\n')
     books = [path[len(prefix):] for path in books]
-    return get_ids(books)
-
-def find_fulltext_windows(query):
-    prefix = get_prefix()
-    prefix = os.path.normpath(prefix)
-    cmd = ['findstr', '/i', '/c:' + query, '/d:' + prefix]
-    books = subprocess.check_output(cmd).decode().strip().split('\n')
-    books = [b.split(':')[0] for b in books]
-    return get_ids(books, prefix)
+    ids = [b[0] for b in File.query.filter(operators.in_op(File.path, books)).values('sha1')]
+    return ids
 
 def find_fulltext(query):
     ids = []
diff --git a/oml/media/cbr.py b/oml/media/cbr.py
index 0c29fe2..fdade82 100644
--- a/oml/media/cbr.py
+++ b/oml/media/cbr.py
@@ -10,10 +10,13 @@ def cover(path):
     try:
         from unrar import rarfile
         rar = rarfile.RarFile(path)
-        files = rar.namelist()
-        if files:
-            cover = ox.sorted_strings(files)[0]
-            data = rar.read(cover)
+        for cover in ox.sorted_strings(rar.namelist()):
+            try:
+                data = rar.read(cover)
+            except:
+                data = None
+            finally:
+                return data
     except:
         data = None
     return data
diff --git a/oml/media/cbz.py b/oml/media/cbz.py
index b08c972..83fba49 100644
--- a/oml/media/cbz.py
+++ b/oml/media/cbz.py
@@ -15,12 +15,14 @@ def cover(path):
         return data
     files = [f.filename for f in z.filelist]
     if files:
-        cover = ox.sortedstrings(files)[0]
-        try:
-            data = z.read(cover)
-        except:
-            data = None
-    return data
+        for cover in ox.sortedstrings(files):
+            try:
+                data = z.read(cover)
+            except:
+                data = None
+            finally:
+                return data
+
 
 def info(path):
     data = {}
diff --git a/oml/update.py b/oml/update.py
index 8e533d9..83c490a 100644
--- a/oml/update.py
+++ b/oml/update.py
@@ -196,7 +196,7 @@ def install():
         shutil.copy(os.path.join(settings.updates_path, 'release.json'), os.path.join(settings.data_path, 'release.json'))
         upgrade_app()
         # FIXME: still needed?
-        if old_version < '20160112-651-de984a3' and platform != 'win32':
+        if old_version < '20160112-651-de984a3':
             subprocess.call(['./ctl', 'postupdate', '-o', old_version, '-n', new_version])
         return True
     return True
@@ -253,7 +253,6 @@ def upgrade_app():
                 shutil.copytree(bundled_app, app)
             except:
                 logger.debug('Failed to update Application', exc_info=True)
-    '''
     elif sys.platform == 'win32':
         current_version = get_trayicon_version()
         if current_version != '0.2.0.0':
@@ -263,7 +262,6 @@ def upgrade_app():
             startupinfo.dwFlags |= subprocess.STARTF_USESHOWWINDOW
             startupinfo.wShowWindow = subprocess.SW_HIDE
             subprocess.Popen(cmd, cwd=settings.base_dir, start_new_session=True, startupinfo=startupinfo)
-    '''
 
 def getVersion(data):
     '''
diff --git a/oml/utils.py b/oml/utils.py
index 6e6d924..5130156 100644
--- a/oml/utils.py
+++ b/oml/utils.py
@@ -369,23 +369,12 @@ def update_static():
     )
 
 def check_pid(pid):
-    if sys.platform == 'win32':
-        import ctypes
-        kernel32 = ctypes.windll.kernel32
-        SYNCHRONIZE = 0x100000
-        process = kernel32.OpenProcess(SYNCHRONIZE, 0, pid)
-        if process != 0:
-            kernel32.CloseHandle(process)
-            return True
-        else:
-            return False
+    try:
+        os.kill(pid, 0)
+    except:
+        return False
     else:
-        try:
-            os.kill(pid, 0)
-        except:
-            return False
-        else:
-            return True
+        return True
 
 def check_pidfile(pid):
     try:
diff --git a/requirements-shared.txt b/requirements-shared.txt
index 3b4600f..ced1c73 100644
--- a/requirements-shared.txt
+++ b/requirements-shared.txt
@@ -1,4 +1,5 @@
 requests==2.21.0
+tornado==5.1.1
 chardet
 html5lib
 #ox>=2.0.666
diff --git a/requirements.txt b/requirements.txt
index 16e5d69..bef4257 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -6,4 +6,3 @@ pyopenssl>=0.15
 pyCrypto>=2.6.1
 pillow
 netifaces
-tornado==5.1.1