This is the most common cause of instability.
1. Remove Conflicting Drivers
2. Install the Correct Miracle Driver
3. Manual Driver Assignment (Device Manager) If the device connects and disconnects rapidly:
Windows often cuts power to USB ports to save battery, causing the "Unstable" error mid-operation.
Plug the Miracle Box dongle directly into a USB 2.0 port on the back of your PC (not front panel). If you must use a hub, invest in a powered USB 3.0 hub.