hey this should work, just do this on the doc's computer....not the one with the isdn.
If you have Internet Explorer 4.x or higher installed, follow these steps...
1. Click on the Start button
2. Highlight Settings in the start menu
3. Click on Control Panel
4. Double-click on the Internet Options icon
5. Click on the Connections tab
6. Click "Never dial a connection"
7. Click the OK button
let me know if that doesn't work, it might not if windows update is the thing causing the problem. i dunno