diff --git a/oml/fulltext.py b/oml/fulltext.py
index d7d6d3e..d1cd5ee 100644
--- a/oml/fulltext.py
+++ b/oml/fulltext.py
@@ -7,15 +7,30 @@ from sqlalchemy.sql import operators
 
 logger = logging.getLogger(__name__)
 
-def find_fulltext_macos(query):
+
+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
-    prefix = os.path.join(os.path.expanduser(settings.preferences['libraryPath']), 'Books/')
+    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()
     cmd = ["mdfind", "-onlyin", prefix, query]
     books = subprocess.check_output(cmd).decode().strip().split('\n')
     books = [path[len(prefix):] for path in books]
-    ids = [b[0] for b in File.query.filter(operators.in_op(File.path, books)).values('sha1')]
-    return ids
+    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)
 
 def find_fulltext(query):
     ids = []
diff --git a/oml/media/cbr.py b/oml/media/cbr.py
index fdade82..0c29fe2 100644
--- a/oml/media/cbr.py
+++ b/oml/media/cbr.py
@@ -10,13 +10,10 @@ def cover(path):
     try:
         from unrar import rarfile
         rar = rarfile.RarFile(path)
-        for cover in ox.sorted_strings(rar.namelist()):
-            try:
-                data = rar.read(cover)
-            except:
-                data = None
-            finally:
-                return data
+        files = rar.namelist()
+        if files:
+            cover = ox.sorted_strings(files)[0]
+            data = rar.read(cover)
     except:
         data = None
     return data
diff --git a/oml/media/cbz.py b/oml/media/cbz.py
index 83fba49..b08c972 100644
--- a/oml/media/cbz.py
+++ b/oml/media/cbz.py
@@ -15,14 +15,12 @@ def cover(path):
         return data
     files = [f.filename for f in z.filelist]
     if files:
-        for cover in ox.sortedstrings(files):
-            try:
-                data = z.read(cover)
-            except:
-                data = None
-            finally:
-                return data
-
+        cover = ox.sortedstrings(files)[0]
+        try:
+            data = z.read(cover)
+        except:
+            data = None
+    return data
 
 def info(path):
     data = {}
diff --git a/oml/update.py b/oml/update.py
index 83c490a..8e533d9 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':
+        if old_version < '20160112-651-de984a3' and platform != 'win32':
             subprocess.call(['./ctl', 'postupdate', '-o', old_version, '-n', new_version])
         return True
     return True
@@ -253,6 +253,7 @@ 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':
@@ -262,6 +263,7 @@ 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 5130156..6e6d924 100644
--- a/oml/utils.py
+++ b/oml/utils.py
@@ -369,12 +369,23 @@ def update_static():
     )
 
 def check_pid(pid):
-    try:
-        os.kill(pid, 0)
-    except:
-        return False
+    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
     else:
-        return True
+        try:
+            os.kill(pid, 0)
+        except:
+            return False
+        else:
+            return True
 
 def check_pidfile(pid):
     try:
diff --git a/requirements-shared.txt b/requirements-shared.txt
index ced1c73..3b4600f 100644
--- a/requirements-shared.txt
+++ b/requirements-shared.txt
@@ -1,5 +1,4 @@
 requests==2.21.0
-tornado==5.1.1
 chardet
 html5lib
 #ox>=2.0.666
diff --git a/requirements.txt b/requirements.txt
index bef4257..16e5d69 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -6,3 +6,4 @@ pyopenssl>=0.15
 pyCrypto>=2.6.1
 pillow
 netifaces
+tornado==5.1.1