The Wii U System Update 4.0.3 is now live.
The small download can be completed within a couple of minutes on the system, which has the usual goals for stability:
System stability improvements and other adjustments
- Further improvements to overall system stability and other minor adjustments have been made to enhance the user’s experience.
The Wii U update is available in North America and Europe. Let us know if you experience any changes.
Source: Nintendo Life