Article ID: 923966
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On a Windows XP Tablet PC Edition 2005-based Tablet PC, you install the pen service (Wisptis.exe). The pen service does not exclude certain human interface device (HID) digitizers.
This behavior affects some custom digitizers that do not belong to the input devices for the pen service. These digitizers may become unavailable. Therefore, the pen service may prevent the custom application from using the custom devices.
In the current implementation of the Wisptis.exe process, the pen service assumes that any HID that has a top-level collection belongs to the pen service if the top-level collection specifies a usage page for the digitizer.
Note The top-level collection specifies that the usage page for the digitizer is 0x0d.
A hotfix is available to change this behavior. This hotfix updates the pen service. The new version of the pen service excludes all HID digitizers that do not have a usage page for the following elements:
Hotfix informationA 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:
http://support.microsoft.com/contactus/?ws=supportNote 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.
PrerequisitesThe following list contains prerequisites for the hotfix:
Restart requirementYou must restart the computer after you apply this hotfix.
Hotfix replacement informationThis hotfix does not replace a previously released hotfix.
Registry informationTo use one of the hotfixes in this package, you do not have to make any changes to the registry.
File informationThe English version of this hotfix has the file attributes (or later file attributes) 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 item in Control Panel.
Windows XP with SP2, x86-based versions
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Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
For more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base:
(https://support.microsoft.com/kb/824684/LN/ )Description of the standard terminology that is used to describe Microsoft software updates
(http://go.microsoft.com/fwlink/?LinkId=151500)for other considerations.