diff --git a/src/Window.zig b/src/Window.zig
index 6717a96..6cb1361 100644
--- a/src/Window.zig
+++ b/src/Window.zig
@@ -51,6 +51,8 @@ pub fn shouldManage(window: Window) bool {
 
     if (window.isCloaked()) return false;
 
+    if (window.isSystemWindow()) return false;
+
     const styles: win32.ui.windows_and_messaging.WINDOW_STYLE = window.style();
     const ex_styles: win32.ui.windows_and_messaging.WINDOW_EX_STYLE = window.exStyle();
 
@@ -130,6 +132,35 @@ fn owner(window: Window) ?win32.foundation.HWND {
     );
 }
 
+const class_name_max_len: usize = 256;
+
+fn className(window: Window, buf: *[class_name_max_len:0]u16) []const u16 {
+    const len: i32 = win32.ui.windows_and_messaging.GetClassNameW(window.handle, buf, class_name_max_len);
+    if (len <= 0) return &.{};
+    return buf[0..@intCast(len)];
+}
+
+const system_classes: [4][]const u16 = .{
+    std.unicode.utf8ToUtf16LeStringLiteral("SysListView32"),
+    std.unicode.utf8ToUtf16LeStringLiteral("WorkerW"),
+    std.unicode.utf8ToUtf16LeStringLiteral("Shell_TrayWnd"),
+    std.unicode.utf8ToUtf16LeStringLiteral("Shell_SecondaryTrayWnd"),
+};
+
+fn isSystemWindow(window: Window) bool {
+    if (window.handle == win32.ui.windows_and_messaging.GetDesktopWindow()) return true;
+    if (window.handle == win32.ui.windows_and_messaging.GetShellWindow()) return true;
+
+    var buf: [class_name_max_len:0]u16 = undefined;
+    const name: []const u16 = window.className(&buf);
+
+    for (system_classes) |sys_class| {
+        if (std.mem.eql(u16, name, sys_class)) return true;
+    }
+
+    return false;
+}
+
 const log = std.log.scoped(.window);
 
 const Monitor = @import("Monitor.zig");