The problem isn't with your ISP - it's with a service on your computer.
To fix it,
1. Click Start >> Run >> and type "services.msc" and click OK.
This will take you to the list of Services hidden in the Administrative Tools.
2. In the list of services, click "DNS Client".
3. Make sure that the Status column displays Started and that the Startup Type column displays Automatic.
4. If the service is not set to Started or if the startup type for the DNS Client service is not set to Automatic, follow these steps:a. Right-click DNS Client, and then click Propertie