Touch input stops working when two users are logged on at the same time in Windows Vista

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Article ID: 933288 - View products that this article applies to.
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SYMPTOMS

When two users are logged on at the same time to a Tablet PC that is running Windows Vista, touch input may stop working. This problem may occur if the following conditions are true:
  • One user has a standard user account.
  • The other user has an administrator user account.
  • Both users use the Fast User Switching feature to switch users without logging off.
When the second user uses the Fast User Switching feature, the Welcome screen appears, and touch input stops working.

RESOLUTION

Service pack information

To resolve this problem, obtain the latest service pack for Windows Vista. For more information, click the following article number to view the article in the Microsoft Knowledge Base:
935791 How to obtain the latest Windows Vista 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:
http://support.microsoft.com/contactus/?ws=support
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.

File information

The 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 Vista, 32-bit (x86-based) versions
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File nameFile versionFile sizeDateTimePlatform
Update.mumNot Applicable1,99306-Mar-200722:16Not Applicable
Win32k.sys6.0.6000.205502,027,52006-Mar-200701:52x86
X86_6d904ed3d91d5e3027833c8b3209da63_31bf3856ad364e35_6.0.6000.20550_none_de0a826e3c915317.manifestNot Applicable69406-Mar-200722:16Not Applicable
X86_microsoft-windows-win32k_31bf3856ad364e35_6.0.6000.20550_none_b760c477b6a66a00.manifestNot Applicable6,92806-Mar-200722:17Not Applicable
Windows Vista, 64-bit versions
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Amd64_d35284cae87d18fce9e11c1b33147e26_31bf3856ad364e35_6.0.6000.20550_none_cf3c4186ea08a7d5.manifestNot Applicable69806-Mar-200722:16Not Applicable
Amd64_microsoft-windows-win32k_31bf3856ad364e35_6.0.6000.20550_none_137f5ffb6f03db36.manifestNot Applicable6,94406-Mar-200722:44Not Applicable
Update.mumNot Applicable1,99306-Mar-200722:16Not Applicable
Win32k.sys6.0.6000.205502,749,95206-Mar-200702:08x64

STATUS

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 Windows Vista Service Pack 1.

MORE INFORMATION

For more information about the terms that are used to describe software updates, click the following article number to view the article in the Microsoft Knowledge Base:
824684 Description of the standard terminology that is used to describe Microsoft software updates

Properties

Article ID: 933288 - Last Review: May 20, 2008 - Revision: 3.1
APPLIES TO
  • Windows Vista Home Premium
  • Windows Vista Ultimate
  • Windows Vista Business
  • Windows Vista Enterprise
  • Windows Vista Home Premium 64-bit Edition
  • Windows Vista Ultimate 64-bit Edition
  • Windows Vista Enterprise 64-bit Edition
Keywords: 
kbautohotfix kbvistasp1fix kbfix kbbug kbhotfixserver kbqfe kbexpertisebeginner KB933288

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