How Do I Download Previous Zune Software?by Stephen Lilley
In order to transfer media files to your Zune device, you need to have the Zune software installed on your computer. Not only does this software allow you to transfer files to your device, it also allows you to play all of your files from your computer and even access the Zune Marketplace digital music store. If you're unhappy with an update to the Zune software, you can download old versions of the program using the Internet.
Open your web browser.
Go to CNET's File Downloading page (see References), Brothersoft.com (see References) or one of the many other websites that archive old versions of computer software.
Type "Zune Software" and then the version number that you're looking for into the "Search" box and click "Search."
Click "Download" on the page that appears on screen. This will download the older version of Microsoft's Zune software to your computer's hard drive.