Error 7 is related to the Timed Out operation which means that your request couldn't reach the target server. There is a problem with your Internet connection. In this case you should contact your ISP in order to diagnose it.
If you have a USB modem, I suggest you uninstall its support software and then install it again or check its configuration settings. Usually, the configuration settings of these applications get affected by other uninstallers so it's best to uninstall it and then perform a fresh installation.