National Capital FreeNet / Libertel de la capitale nationale

USB dialup modem problems in Windows 10

Dial-up Quick Configuration Info

NCF currently operates one pool of modems:

Phone Numbers   Max Users   Type
  23   PPP or text
  23   PPP or text

Please note that long distance charges may apply outside your local calling area.

Dial-up error 633

This error appeared with the US Robotics USR5637 USB dialup modem when Windows 10 was updated to the Creator version (1703), and may also have appeared with other USB modems and devices. The error occurs when you try to use the modem, and the error code indicates that the modem cannot be set up for use.

Before attempting to fix the problem, ensure that all relevant software is up to date:

This may fix the problem, particularly if Windows 10 or the driver has been updated with a solution to the problem.

If the problem is not fixed, the next step is a change to the Windows 10 Registry. Changes to the Registry can be quite risky - a mistake can make the computer unusable. Registry changes should be carefully made by a technically knowledgeable person.

The required registry change is described at Dial-up error 633 w/build 15063 (1703 Creators) Pro. The change is made by adding one extra line ("SeLoadDriverPrivilege") to the registry value HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\RasMan\RequiredPrivileges without changing any of the previously existing lines. Restart the computer after making the change,

The change is illustrated below