Error 633: The port is already in use / not configured for Remote Access Dialout

Select an error code:

This can be caused by a number of things:

One-off error that is solved by rebooting
The modem is actually in use. Ensure no other applications are using the modem
The modem driver is corrupt
Invalid or corrupt Dial-Up Networking settings
Windows 95/98 - This behavior can occur if the Unimodem TAPI Service Provider file (Unimdm.tsp) is missing or damaged. See Microsoft support page http://support.microsoft.com/kb/q150619/

Solutions

1. Restart the computer. Allow the operating system to load and make sure the modem is properly connected and initialised.

2. Try uninstalling and reinstalling your Broadband modem. Refer to your modem instruction manual or your ISP if they provided you with the modem.

3. Disable any other modems, if you have any others installed.

If you continue to receive this error you should contact your broadband provider's support helpline.