Multiple Entries for a Single Modem Appear After You Upgrade from Windows NT to Windows XP (306434)


The information in this article applies to:

  • Microsoft Windows XP Professional
  • Microsoft Windows XP Home Edition
This article was previously published under Q306434

SYMPTOMS

After you upgrade from Microsoft Windows NT 4.0 to Windows XP, multiple entries for a modem may exist on the Modems tab of the Phone and Modem Options tool in Control Panel. However, you may only have one modem, and only one of the entries may be valid and work correctly.

CAUSE

This problem can occur because of an erroneous registry entry in the Windows NT 4.0 registry. Because of this entry, Windows XP Setup cannot discover if the modem was correctly installed as a Plug-and-Play modem.

RESOLUTION

To work around this problem, remove all of the modem entries, and then restart your computer to redetect the modem.

STATUS

Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article.
Modification Type:MajorLast Reviewed:10/18/2001
Keywords:kbenv kbprb kbui KB306434
©2002 Microsoft Corporation. All rights reserved.