diff --git a/module/device/platform/emulator_windows.py b/module/device/platform/emulator_windows.py
index 021203a..4095ba9 100644
--- a/module/device/platform/emulator_windows.py
+++ b/module/device/platform/emulator_windows.py
@@ -299,12 +299,23 @@ class Emulator(EmulatorBase):
             for folder in self.list_folder('../vms', is_dir=True):
                 for file in iter_folder(folder, ext='.nemu'):
                     serial = Emulator.vbox_file_to_serial(file)
+                    name = os.path.basename(folder)
                     if serial:
                         yield EmulatorInstance(
                             serial=serial,
-                            name=os.path.basename(folder),
+                            name=name,
                             path=self.path,
                         )
+                    # Fix for MuMu12 v4.0.4, default instance of which has no forward record in vbox config
+                    else:
+                        instance = EmulatorInstance(
+                            serial=serial,
+                            name=name,
+                            path=self.path,
+                        )
+                        if instance.MuMuPlayer12_id:
+                            instance.serial = f'127.0.0.1:{16384 + 32 * instance.MuMuPlayer12_id}'
+                            yield instance
         elif self == Emulator.MEmuPlayer:
             # ./MemuHyperv VMs/{name}/{name}.memu
             for folder in self.list_folder('./MemuHyperv VMs', is_dir=True):