Microsoft small business knowledge base

Article ID: 817521 - Last Review: October 26, 2006 - Revision: 2.5

Hotfix Download Available
View and request hotfix downloads

On This Page


After you undock your portable computer from a port replicator that has an external monitor attached, the screen resolution does not change back to the resolution that it was set to before you docked the computer. This problem occurs if the screen resolution setting of the external monitor is different from the screen resolution setting of your portable computer.

For example:
  • You configure the screen resolution on your undocked portable computer to 1400 x 1050.
  • You connect your portable computer to a port replicator that has an external monitor attached, and then you change the external monitor screen resolution to 800 x 600.
  • You shut down your portable computer and remove it from the port replicator, and then you restart Windows XP.

    When your computer restarts, the screen resolution does not change back to the original setting of 1400 x 1050, but instead uses the 800 x 600 setting that you configured for the external monitor.


Service pack information

To resolve this problem, obtain the latest service pack for Microsoft Windows XP. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:
322389  ( ) How to obtain the latest Windows XP service pack

Hotfix information

A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next software update that contains this hotfix.

If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, contact Microsoft Customer Service and Support to obtain the hotfix.

Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site: (
Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.

The English version of this hotfix has the file attributes (or later) that are listed in the following table. The dates and times for these files are listed in coordinated universal time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel.
   Date         Time   Version            Size    File name
   02-Apr-2003  18:14  5.1.2600.1195   1,694,592  Win32k.sys


Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section. This problem was first corrected in Microsoft Windows XP Service Pack 2.

  • Microsoft Windows XP Professional
  • Microsoft Windows XP Home Edition
kbautohotfix kbhotfixserver kbwinxpsp2fix kbqfe kbwinxppresp2fix kbfix kbbug KB817521
Additional support options
Ask The Microsoft Small Business Support Community
Contact Microsoft Small Business Support
Find Microsoft Small Business Support Certified Partner
Find a Microsoft Store For In-Person Small Business Support