Make sure that you're connected to the Internet. You might have lost your Wi-Fi connection, your service might be down, or your router might be offline and just need a restart.
To check your connection on the computer having the problem, click the Start button, and then click Control Panel.
Or, if you’re using Windows 8: On the Start screen, type Control Panel,and then open Control Panel from the results. Click or tap Network and Internet, and then click or tap View network status and tasks. This screen will tell you whether you're connected to a network.
If you're not connected, click or tap Connect to a network in the status window, and then select an available network.
If you’re connected to the wrong network, select the right one and enter your passcode if prompted.
If you still can’t connect to the Internet, there might be a problem with your Internet service. Wait and sign in again later, or contact your Internet service provider.
Make sure the time and date are set correctly on your computer. To change these settings, click the time in the notification area at the far right of the taskbar, click Change date and time setting, and then make the appropriate changes.
Delete your web browser's history, cache and temporary files.
If you’re using Internet Explorer:
Open your browser. If you’re using Windows 8, open Internet Explorer in your desktop. Press or tap the Alt key on your keyboard to see the menu bar.
Click or tap Tools, and then click or tap Internet options.
On the General tab, locate Browsing history, and then click or tap the Delete button. A Delete Browsing History box will open.
Select the Temporary Internet files check box, and then clear all the other check boxes.
Click or tap the Delete button.
Restart the Zune software and see if you can access your items.
If you’re using one of the following browsers, see “Solution 1: Clear your Internet cache and delete cookies” at the appropriate webpage: