Last week, we had told you about the impending Zune HD 4.5 firmware update and the wait was definitely not that long as Microsoft has released the Zune HD 4.5 Firmware to users.
Firmware 4.5 for Zune HD adds a new application called Smart DJ, which is somewhat similar to the iPod Genius feature. he update will provide expanded MPEG-4 Part 2 Advanced Simple Profile support which includes Xvid and AVI codec support as well.
To update to Zune HD 4.5 Firmware, connect your Zune device to the Zune software and go to Settings -> Device -> Player Update. If your device is connected you can check for software updates and upgrade to the latest firmware.
Watch a video of the new features which are available in Microsoft Zune HD Firmware 4.5.