diff --git a/.gitignore b/.gitignore
index f6adb8394..d25f19e77 100644
--- a/.gitignore
+++ b/.gitignore
@@ -117,3 +117,5 @@ UpgradeLog*.XML
 Wox/Images/websearch/Thumbs.db
 Wox/Images/Thumbs.db
 Wox/Wox.csproj
+
+*.sublime-*
diff --git a/Wox.Infrastructure/Storage/UserSettings/UserSettingStorage.cs b/Wox.Infrastructure/Storage/UserSettings/UserSettingStorage.cs
index da16cc931..8a6f8a193 100644
--- a/Wox.Infrastructure/Storage/UserSettings/UserSettingStorage.cs
+++ b/Wox.Infrastructure/Storage/UserSettings/UserSettingStorage.cs
@@ -44,6 +44,12 @@ namespace Wox.Infrastructure.Storage.UserSettings
         [JsonProperty]
         public List<WebSearch> WebSearches { get; set; }
 
+        [JsonProperty]
+        public double WindowLeft { get; set; }
+
+        [JsonProperty]
+        public double WindowTop { get; set; }
+
         [JsonProperty]
         public List<ProgramSource> ProgramSources { get; set; }
 
diff --git a/Wox.Plugin.SystemPlugins/BrowserBookmarks.cs b/Wox.Plugin.SystemPlugins/BrowserBookmarks.cs
index 4521a6c06..59a201f15 100644
--- a/Wox.Plugin.SystemPlugins/BrowserBookmarks.cs
+++ b/Wox.Plugin.SystemPlugins/BrowserBookmarks.cs
@@ -19,7 +19,7 @@ namespace Wox.Plugin.SystemPlugins
 
         protected override List<Result> QueryInternal(Query query)
         {
-            if (string.IsNullOrEmpty(query.RawQuery) || query.RawQuery.EndsWith(" ") || query.RawQuery.Length <= 1) return new List<Result>();
+            if (query.RawQuery.EndsWith(" ") || query.RawQuery.Length <= 1) return new List<Result>();
 
             var fuzzyMather = FuzzyMatcher.Create(query.RawQuery);
             List<Bookmark> returnList = bookmarks.Where(o => MatchProgram(o, fuzzyMather)).ToList();
diff --git a/Wox.Plugin.SystemPlugins/Calculator.cs b/Wox.Plugin.SystemPlugins/Calculator.cs
index 9453851dd..7968c4b95 100644
--- a/Wox.Plugin.SystemPlugins/Calculator.cs
+++ b/Wox.Plugin.SystemPlugins/Calculator.cs
@@ -33,8 +33,7 @@ namespace Wox.Plugin.SystemPlugins
 
         protected override List<Result> QueryInternal(Query query)
         {
-            if (string.IsNullOrEmpty(query.RawQuery)
-                || query.RawQuery.Length <= 2          // don't affect when user only input "e" or "i" keyword
+            if (query.RawQuery.Length <= 2          // don't affect when user only input "e" or "i" keyword
                 || !regValidExpressChar.IsMatch(query.RawQuery) 
                 || !IsBracketComplete(query.RawQuery)) return new List<Result>();
 
diff --git a/Wox.Plugin.SystemPlugins/Program/Programs.cs b/Wox.Plugin.SystemPlugins/Program/Programs.cs
index 3d45e5364..f1906f8c5 100644
--- a/Wox.Plugin.SystemPlugins/Program/Programs.cs
+++ b/Wox.Plugin.SystemPlugins/Program/Programs.cs
@@ -51,7 +51,7 @@ namespace Wox.Plugin.SystemPlugins.Program
 
         protected override List<Result> QueryInternal(Query query)
         {
-            if (string.IsNullOrEmpty(query.RawQuery) || query.RawQuery.EndsWith(" ") || query.RawQuery.Length <= 1) return new List<Result>();
+            if (query.RawQuery.EndsWith(" ") || query.RawQuery.Length <= 1) return new List<Result>();
 
             var fuzzyMather = FuzzyMatcher.Create(query.RawQuery);
             List<Program> returnList = installedList.Where(o => MatchProgram(o, fuzzyMather)).ToList();
diff --git a/Wox.Plugin.SystemPlugins/Sys.cs b/Wox.Plugin.SystemPlugins/Sys.cs
index fd85057f2..ec48fbea7 100644
--- a/Wox.Plugin.SystemPlugins/Sys.cs
+++ b/Wox.Plugin.SystemPlugins/Sys.cs
@@ -25,7 +25,7 @@ namespace Wox.Plugin.SystemPlugins
 
         protected override List<Result> QueryInternal(Query query)
         {
-            if (string.IsNullOrEmpty(query.RawQuery) || query.RawQuery.EndsWith(" ") || query.RawQuery.Length <= 1) return new List<Result>();
+            if (query.RawQuery.EndsWith(" ") || query.RawQuery.Length <= 1) return new List<Result>();
 
             List<Result> results = new List<Result>();
 
@@ -94,7 +94,7 @@ namespace Wox.Plugin.SystemPlugins
                 Action = (c) =>
                 {
                     ProcessStartInfo Info = new ProcessStartInfo();
-                    Info.Arguments = "/C ping 127.0.0.1 -n 1 && \"" + Application.ExecutablePath + "\"";
+                    Info.Arguments = "/C sleep 1 && \"" + Application.ExecutablePath + "\"";
                     Info.WindowStyle = ProcessWindowStyle.Hidden;
                     Info.CreateNoWindow = true;
                     Info.FileName = "cmd.exe";
diff --git a/Wox.Plugin.SystemPlugins/ThirdpartyPluginIndicator.cs b/Wox.Plugin.SystemPlugins/ThirdpartyPluginIndicator.cs
index a81cd036d..d1759b17e 100644
--- a/Wox.Plugin.SystemPlugins/ThirdpartyPluginIndicator.cs
+++ b/Wox.Plugin.SystemPlugins/ThirdpartyPluginIndicator.cs
@@ -16,7 +16,6 @@ namespace Wox.Plugin.SystemPlugins
         protected override List<Result> QueryInternal(Query query)
         {
             List<Result> results = new List<Result>();
-            if (string.IsNullOrEmpty(query.RawQuery)) return results;
 
             foreach (PluginMetadata metadata in allPlugins.Select(o => o.Metadata))
             {
diff --git a/Wox.Plugin.SystemPlugins/WebSearch/WebSearchPlugin.cs b/Wox.Plugin.SystemPlugins/WebSearch/WebSearchPlugin.cs
index b4c7830ef..eeefdc360 100644
--- a/Wox.Plugin.SystemPlugins/WebSearch/WebSearchPlugin.cs
+++ b/Wox.Plugin.SystemPlugins/WebSearch/WebSearchPlugin.cs
@@ -18,7 +18,6 @@ namespace Wox.Plugin.SystemPlugins
         protected override List<Result> QueryInternal(Query query)
         {
             List<Result> results = new List<Result>();
-            if (string.IsNullOrEmpty(query.ActionName)) return results;
 
             WebSearch webSearch =
                 UserSettingStorage.Instance.WebSearches.FirstOrDefault(o => o.ActionWord == query.ActionName && o.Enabled);
diff --git a/Wox/MainWindow.xaml.cs b/Wox/MainWindow.xaml.cs
index c7215905b..e48e74378 100644
--- a/Wox/MainWindow.xaml.cs
+++ b/Wox/MainWindow.xaml.cs
@@ -140,13 +140,26 @@ namespace Wox {
 		}
 
 		void MainWindow_Closing(object sender, System.ComponentModel.CancelEventArgs e) {
+			UserSettingStorage.Instance.WindowLeft = Left;
+			UserSettingStorage.Instance.WindowTop = Top;
+			UserSettingStorage.Instance.Save();
 			this.HideWox();
 			e.Cancel = true;
 		}
 
 		private void MainWindow_OnLoaded(object sender, RoutedEventArgs e) {
-			Left = (SystemParameters.PrimaryScreenWidth - ActualWidth) / 2;
-			Top = (SystemParameters.PrimaryScreenHeight - ActualHeight) / 3;
+			if (UserSettingStorage.Instance.WindowLeft == 0
+				&& UserSettingStorage.Instance.WindowTop == 0)
+			{
+				Left = UserSettingStorage.Instance.WindowLeft 
+					 = (SystemParameters.PrimaryScreenWidth - ActualWidth) / 2;
+				Top = UserSettingStorage.Instance.WindowTop 
+					= (SystemParameters.PrimaryScreenHeight - ActualHeight) / 5;
+			}
+			else {
+				Left = UserSettingStorage.Instance.WindowLeft;
+				Top = UserSettingStorage.Instance.WindowTop;
+			}
 
 			Plugins.Init();