IBM ThinkPad Modem Does Not Work After You Upgrade from Windows NT 4.0 to Windows XP Professional (306495)


The information in this article applies to:

  • Microsoft Windows XP Professional
This article was previously published under Q306495

SYMPTOMS

After you upgrade your IBM ThinkPad computer from Microsoft Windows NT 4.0 Workstation to Windows XP, the modem may not work, even though the modem appears to be working properly in Device Manager.

RESOLUTION

To work around this problem:
  1. Search for the Mwwdmhlp.dll file. To search for a file, click Start, click Search, and then follow the instructions on the screen.
  2. Rename the Mwwdmhlp.dll file to Mwwdmhlp.old. To rename a file, right-click it, click Rename, type the new name, and then press ENTER.
  3. Restart your computer so that Windows System File Protection can replace the original Windows NT 4.0 file with a copy from the system catalog.

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:kbprb kbui KB306495
©2002 Microsoft Corporation. All rights reserved.