These messages indicate that your computer has a general networking issue with the domain name service (DNS) that translates numerical IP addresses into human-readable ones.
Confirm that you can reach internet sites such as secondlife.com,Google, or others. Once your computer can connect to these websites, this error should no longer occur.
Also check whether there is a wider issue with Seond Life, as described below.
Usually, restarting your computer and your router will resolve this issue. If not, contact your internet service provider. You may also wish to try using Google's DNS servers to see if that will resolve the issue. See Using Google Public DNS for more information.
