diff --git a/data/language/en-GB.txt b/data/language/en-GB.txt
index fdac66806c..5a16c38273 100644
--- a/data/language/en-GB.txt
+++ b/data/language/en-GB.txt
@@ -3712,6 +3712,7 @@ STR_6637    :Loading title sequence…
 STR_6638    :Enlarged UI
 STR_6639    :Modifies the interface to be more suitable for touch usage
 STR_6640    :Edit asset packs…
+STR_6641    :Loading/progress window
 
 #############
 # Scenarios #
diff --git a/src/openrct2-ui/interface/Theme.cpp b/src/openrct2-ui/interface/Theme.cpp
index 7f5b78c884..6e605b0db0 100644
--- a/src/openrct2-ui/interface/Theme.cpp
+++ b/src/openrct2-ui/interface/Theme.cpp
@@ -179,10 +179,11 @@ static constexpr WindowThemeDesc WindowThemeDescriptors[] =
     { WindowClass::Changelog,                   "WC_CHANGELOG",                      STR_CHANGELOG_TITLE,                              COLOURS_2(COLOUR_LIGHT_BLUE,               COLOUR_LIGHT_BLUE                                                                   ) },
     { WindowClass::Multiplayer,                 "WC_MULTIPLAYER",                    STR_MULTIPLAYER,                                  COLOURS_3(COLOUR_LIGHT_BLUE,               COLOUR_LIGHT_BLUE,               COLOUR_LIGHT_BLUE                                  ) },
     { WindowClass::Player,                      "WC_PLAYER",                         STR_THEMES_WINDOW_PLAYER,                         COLOURS_3(COLOUR_LIGHT_BLUE,               COLOUR_LIGHT_BLUE,               COLOUR_LIGHT_BLUE                                  ) },
-    { WindowClass::NetworkStatus,               "WC_NETWORK_STATUS",                 STR_THEMES_WINDOW_NETWORK_STATUS,                 COLOURS_1(COLOUR_LIGHT_BLUE                                                                                                    ) },
+    { WindowClass::NetworkStatus,               "WC_NETWORK_STATUS",                 STR_THEMES_WINDOW_NETWORK_STATUS,                 COLOURS_1(COLOUR_BLACK                                                                                                         ) },
     { WindowClass::ServerList,                  "WC_SERVER_LIST",                    STR_SERVER_LIST,                                  COLOURS_2(COLOUR_LIGHT_BLUE,               COLOUR_LIGHT_BLUE                                                                   ) },
     { WindowClass::Chat,                        "WC_CHAT",                           STR_CHAT,                                         COLOURS_1(TRANSLUCENT(COLOUR_GREY)                                                                                             ) },
     { WindowClass::Console,                     "WC_CONSOLE",                        STR_CONSOLE,                                      COLOURS_2(TRANSLUCENT(COLOUR_LIGHT_BLUE),  COLOUR_WHITE                                                                        ) },
+    { WindowClass::ProgressWindow,              "WC_PROGRESS_WINDOW",                STR_THEME_LOADING_WINDOW,                         COLOURS_1(COLOUR_BLACK                                                                                                         ) },
 };
 
 #pragma endregion
diff --git a/src/openrct2-ui/windows/NetworkStatus.cpp b/src/openrct2-ui/windows/NetworkStatus.cpp
index d51063f544..8096d9a805 100644
--- a/src/openrct2-ui/windows/NetworkStatus.cpp
+++ b/src/openrct2-ui/windows/NetworkStatus.cpp
@@ -25,9 +25,9 @@ enum WindowNetworkStatusWidgetIdx {
 };
 
 static Widget window_network_status_widgets[] = {
-    MakeWidget({  0, 0}, {441, 91}, WindowWidgetType::Frame,    WindowColour::Primary                                   ), // panel / background
-    MakeWidget({  1, 1}, {438, 14}, WindowWidgetType::Caption,  WindowColour::Primary, STR_NONE,    STR_WINDOW_TITLE_TIP), // title bar
-    MakeWidget({427, 2}, { 11, 12}, WindowWidgetType::CloseBox, WindowColour::Primary, STR_CLOSE_X, STR_CLOSE_WINDOW_TIP), // close x button
+    MakeWidget({  0, 0}, {400, 91}, WindowWidgetType::Frame,    WindowColour::Primary                                   ), // panel / background
+    MakeWidget({  1, 1}, {397, 14}, WindowWidgetType::Caption,  WindowColour::Primary, STR_NONE,    STR_WINDOW_TITLE_TIP), // title bar
+    MakeWidget({388, 2}, { 11, 12}, WindowWidgetType::CloseBox, WindowColour::Primary, STR_CLOSE_X, STR_CLOSE_WINDOW_TIP), // close x button
     kWidgetsEnd,
 };
 
@@ -101,7 +101,7 @@ static Widget window_network_status_widgets[] = {
         {
             WindowDrawWidgets(*this, dpi);
             thread_local std::string _buffer;
-            _buffer.assign("{BLACK}");
+            _buffer.assign("{WHITE}");
             _buffer += _windowNetworkStatusText;
             GfxClipString(_buffer.data(), widgets[WIDX_BACKGROUND].right - 50, FontStyle::Medium);
             ScreenCoordsXY screenCoords(windowPos.x + (width / 2), windowPos.y + (height / 2));
@@ -141,7 +141,7 @@ static Widget window_network_status_widgets[] = {
         else
         {
             window = WindowCreate<NetworkStatusWindow>(
-                WindowClass::NetworkStatus, 420, 90, WF_10 | WF_TRANSPARENT | WF_CENTRE_SCREEN | WF_STICK_TO_FRONT);
+                WindowClass::NetworkStatus, 400, 90, WF_10 | WF_TRANSPARENT | WF_CENTRE_SCREEN | WF_STICK_TO_FRONT);
         }
 
         window->SetCloseCallBack(onClose);
@@ -165,7 +165,7 @@ static Widget window_network_status_widgets[] = {
     WindowBase* NetworkStatusOpenPassword()
     {
         auto window = WindowFocusOrCreate<NetworkStatusWindow>(
-            WindowClass::NetworkStatus, 420, 90, WF_10 | WF_TRANSPARENT | WF_CENTRE_SCREEN);
+            WindowClass::NetworkStatus, 400, 90, WF_10 | WF_TRANSPARENT | WF_CENTRE_SCREEN);
         char password[33]{};
         WindowTextInputRawOpen(window, WIDX_PASSWORD, STR_PASSWORD_REQUIRED, STR_PASSWORD_REQUIRED_DESC, {}, password, 32);
         window->SetPassword(password);
diff --git a/src/openrct2-ui/windows/Themes.cpp b/src/openrct2-ui/windows/Themes.cpp
index 035644542e..7af9c692dd 100644
--- a/src/openrct2-ui/windows/Themes.cpp
+++ b/src/openrct2-ui/windows/Themes.cpp
@@ -218,6 +218,7 @@ static WindowClass window_themes_tab_7_classes[] = {
     WindowClass::FirePrompt,
     WindowClass::TrackDeletePrompt,
     WindowClass::LoadsaveOverwritePrompt,
+    WindowClass::ProgressWindow,
     WindowClass::NetworkStatus,
 };
     // clang-format on
diff --git a/src/openrct2/localisation/StringIds.h b/src/openrct2/localisation/StringIds.h
index 3a31991ab1..ac760410c4 100644
--- a/src/openrct2/localisation/StringIds.h
+++ b/src/openrct2/localisation/StringIds.h
@@ -1688,6 +1688,8 @@ enum : StringId
     STR_CHECKING_TITLE_SEQUENCES = 6636,
     STR_LOADING_TITLE_SEQUENCE = 6637,
 
+    STR_THEME_LOADING_WINDOW = 6641,
+
     // Have to include resource strings (from scenarios and objects) for the time being now that language is partially working
     /* MAX_STR_COUNT = 32768 */ // MAX_STR_COUNT - upper limit for number of strings, not the current count strings
 };