My computer can't connect to Windows Phone Update If your computer is unable to connect to Windows Phone Update, try the following suggestions. Note This issue is associated with the error code 801811A5. If you're seeing an error message with this code, try these suggestions, and you should be able to complete your update successfully. Make sure you're connected to the Internet The first thing to do is to make sure your computer is connected to the Internet. A quick way to double-check your Internet connection is to browse a well-known website, such as Microsoft.com. If you can't browse websites, check your network connection: If your computer uses a wired connection, make sure that all the network cables are correctly connected. If your computer uses a wireless connection, make sure that the connection is established and stable. In some cases, you may need to switch from a wireless (WiFi) connection to a wired (Ethernet) connection. Or you may need to adjust your computer's firewall or proxy settings. For more info, see the Network connection problems in Windows tutorial. Reconnect your phone and restart the software If you can browse websites, then one or both of the services that the Zune software and Windows Phone 7 Connector for Mac require to run aren't working correctly. You need to make sure that these services are enabled and running so that your phone can download the update. To try enabling the services, disconnect your phone and restart the Zune software or Windows Phone