This article was previously published under Q247177
This article has been archived. It is offered "as is" and will no longer be updated.
If you "hot undock," suspend, and then dock your laptop computer, when the computer resumes it may stop responding (hang) while the Dock Change message is displayed if no Dynamic Host Configuration Protocol (DHCP) server is available to respond to the DHCP Discover requests.
This behavior is caused by a timing issue in the DHCP code that allows multiple threads to modify the same data structure during an Advanced Configuration and Power Interface (ACPI) resume and a Plug and Play dock change event. Typically, only one thread has access to the data structure at a time.
A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that this article describes. Apply it only to systems that are experiencing this specific problem.
To resolve this problem, contact Microsoft Product Support Services to obtain the hotfix. For a complete list of Microsoft Product Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:
Note In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual 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 Version --------------------------------------------------------------------------09-Dec-1999 11:51 4.10.2224 65,279 Vdhcp.386 Windows 98 Second Edition 08-Feb-2000 05:31 4.10.1661 55,159 Vdhcp.386 Windows 95 (all versions)
Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article.
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:
206071 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: