DOCUMENT:Q242941 08-MAY-2002 [win95x] TITLE :Plug and Play Serial Devices Removed During Printer Installation PRODUCT :Microsoft Windows 95.x Retail Product PROD/VER:: OPER/SYS: KEYWORDS:kbhw win95 win98 win98se kbHardware ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft Windows 95 - Microsoft Windows 98 - Microsoft Windows 98 Second Edition ------------------------------------------------------------------------------- SYMPTOMS ======== If you have an active connection that is using a Plug and Play modem and you complete an action (such as installing a printer) that re-enumerates the serial devices, the modem becomes temporarily unavailable and your connection is dropped. After the re-enumeration is complete, the modem reappears in Device Manager and works normally. CAUSE ===== This behavior occurs because all child serial devices are removed and redetected by Serenum.vxd when re-enumeration is triggered. RESOLUTION ========== A supported fix is now available from Microsoft, but it is only intended to correct the problem described in this article and should be applied only to systems experiencing this specific problem. To resolve this problem, contact Microsoft Product Support Services to obtain the fix. For a complete list of Microsoft Product Support Services phone numbers and information on support costs, please go to the following address on the World Wide Web: http://support.microsoft.com/default.aspx?scid=fh;EN-US;CNTACTMS NOTE: In special cases, charges that are normally incurred for support calls may be canceled, if a Microsoft Support Professional determines that a specific update will resolve your problem. Normal support costs will apply to additional support questions and issues that do not qualify for the specific update in question. The English-language version of this fix should have the following file attributes or later: Date Time Version Size File name Platform --------------------------------------------------------------- 10/08/99 8:08:29pm 4.10.2222 20,228 Serenum.vxd Windows 95 10/08/99 8:08:29pm 4.10.2222 20,228 Serenum.vxd Windows 98 10/08/99 8:08:29pm 4.10.2222 20,228 Serenum.vxd Windows 98 Second Edition WORKAROUND ========== To work around this problem, disconnect any Plug and Play modems before reconfiguring devices. STATUS ====== Microsoft has confirmed this to be a problem in the Microsoft products that are listed at the beginning of this article. MORE INFORMATION ================ For additional information about Windows 98 and Windows 98 Second Edition hotfixes, click the article number below to view the article in the Microsoft Knowledge Base: Q206071 General Information About Windows 98 and Windows 98 Second Edition Hotfixes For additional information about Windows 95 hotfixes, click the article number below to view the article in the Microsoft Knowledge Base: Q161020 Implementing Windows 95 Updates Additional query words: w95qfe ====================================================================== Keywords : kbhw win95 win98 win98se kbHardware Technology : kbWin95search kbWin98search kbWin98SEsearch kbZNotKeyword3 kbWin98 kbWin98SE Version : : Issue type : kbprb ============================================================================= THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY. Copyright Microsoft Corporation 2002.