diff --git a/Wox/PublicAPIInstance.cs b/Wox/PublicAPIInstance.cs
index 61fed11e0c..36d995fbe4 100644
--- a/Wox/PublicAPIInstance.cs
+++ b/Wox/PublicAPIInstance.cs
@@ -1,21 +1,16 @@
 using System;
 using System.Collections.Generic;
-using System.Diagnostics;
 using System.Linq;
 using System.Net;
 using System.Threading.Tasks;
 using System.Windows;
-using NHotkey;
-using NHotkey.Wpf;
 using Squirrel;
 using Wox.Core.Plugin;
 using Wox.Core.Resource;
-using Wox.Core.UserSettings;
 using Wox.Helper;
 using Wox.Infrastructure.Hotkey;
 using Wox.Plugin;
 using Wox.ViewModel;
-using static Wox.ViewModel.SettingWindowViewModel;
 
 namespace Wox
 {
diff --git a/Wox/ResultListBox.xaml.cs b/Wox/ResultListBox.xaml.cs
index 23b70f3e32..ce6de8afb4 100644
--- a/Wox/ResultListBox.xaml.cs
+++ b/Wox/ResultListBox.xaml.cs
@@ -1,11 +1,6 @@
-using System.Collections.Generic;
-using System.Linq;
-using System.Runtime.Remoting.Contexts;
-using System.Windows;
+using System.Runtime.Remoting.Contexts;
 using System.Windows.Controls;
 using System.Windows.Input;
-using Wox.Plugin;
-using Wox.ViewModel;
 
 namespace Wox
 {
diff --git a/Wox/SettingWindow.xaml.cs b/Wox/SettingWindow.xaml.cs
index 06a4028f79..5076be5eb8 100644
--- a/Wox/SettingWindow.xaml.cs
+++ b/Wox/SettingWindow.xaml.cs
@@ -7,8 +7,6 @@ using System.Net;
 using System.Windows;
 using System.Windows.Controls;
 using System.Windows.Input;
-using System.Windows.Media;
-using System.Windows.Media.Imaging;
 using System.Windows.Navigation;
 using Microsoft.Win32;
 using NHotkey;
@@ -17,11 +15,9 @@ using Wox.Core;
 using Wox.Core.Plugin;
 using Wox.Core.Resource;
 using Wox.Core.UserSettings;
-using Wox.Helper;
 using Wox.Infrastructure.Hotkey;
 using Wox.Plugin;
 using Wox.ViewModel;
-using Stopwatch = Wox.Infrastructure.Stopwatch;
 
 namespace Wox
 {
diff --git a/Wox/ViewModel/SettingWindowViewModel.cs b/Wox/ViewModel/SettingWindowViewModel.cs
index b5eae219b5..efd67b633c 100644
--- a/Wox/ViewModel/SettingWindowViewModel.cs
+++ b/Wox/ViewModel/SettingWindowViewModel.cs
@@ -1,6 +1,5 @@
 using System;
 using System.Collections.Generic;
-using System.Diagnostics;
 using System.IO;
 using System.Linq;
 using System.Windows;