This article was previously published under Q318009
When you try to establish a dial-up connection after you upgrade your computer to Microsoft Windows XP from Microsoft Windows 98, from Microsoft Windows 98 Second Edition, or from Microsoft Windows Millennium Edition (Me), you may receive an error message that is similar to one of the following:
Error 721: The remote computer is not responding.
Error 678: The remote computer failed to respond.
Error 691: Access was denied because the user name and/or password was invalid on the domain.
Error 777: The connection attempt failed because the modem or other connecting device on the remote computer is out of order.
This issue may occur if the modem driver is not compatible with Windows XP. This issue has been reported to occur with Lucent Win modems that are included with the following Hewlett-Packard (HP) computers:
HP Pavilion 6736 HP Pavilion 6745c HP Pavilion 7400 HP Pavilion 7800 HP Pavilion 7845 HP Pavilion 7850 HP Pavilion 7855 HP Pavilion 7940 HP Pavilion 8655 HP Pavilion 8756c HP Pavilion XT846 HP Pavilion XT856 HP Pavilion XT923
To resolve this issue, contact the hardware manufacturer to inquire about how to obtain and install the latest Windows XP-compatible driver for the modem. For more information about how to contact HP, visit the following HP Web site:
Microsoft provides third-party contact information to help you find technical support. This contact information may change without notice. Microsoft does not guarantee the accuracy of this third-party contact information. Note In certain situations, you may also have to update the BIOS on the computer. For more information about how to obtain the latest BIOS update for your HP computer, visit the following HP Web site:
The third-party products that this article discusses are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, regarding the performance or reliability of these products.