Matt Goyer points us to new updates for the HP Digital Entertainment Center z545 (dual tuner) and I just discovered the same for the z540 (single tuner) version as well.
It's great to see HP doing this. There are some really good fixes included here for USB-related issues and PC performance related to the LCD et al.
Disclaimer The opinions expressed herein are my own personal opinions and do not represent my employer's view in any way.