Sync your Zune to another computer
When you connect your Zune to your computer for the first time, you're linking your device to the Zune software on that computer. That computer will remember your Zune and all of its settings and history.
What if you want to connect to a different computer, say, at work? You can do that, too. As long as you have the Zune software installed, you can connect to another computer as a "guest" and sync items to and from your Zune—that is, to your Zune from the computer and from the computer to your Zune.
The first time you connect your Zune to another computer, select Always connect to this device as a guest. That computer will recognize your Zune as a guest from that point on. It will not, however, record your sync history, update your song info or album art, or provide a lot of the other perks that you get on your primary computer.
If you ever want to end the guest relationship on the new computer, click Forget This Device the next time you connect your Zune.
Some tips about connecting your Zune as a guest: