When you capture a screen shot on a computer that is running Windows Vista or Windows Server 2008, the screen freezes, and you have to restart the computer

Consider the following scenario:

• You configure a computer to use the Windows Aero color scheme feature.
• You capture a screen shot by pressing PRINT SCREEN on the keyboard.
• You move or resize the target window while you capture the screen shot.

In this scenario, the screen freezes, and you have to restart the computer.

This problem occurs when the computer is running one of the following:

• Windows Vista that has hotfix 937229 installed
• Windows Vista SP1
• Windows Server 2008

Notes

• When you press PRINT SCREEN to capture a screen shot, the BitBlt function or the StretchBlt function is called.
• If you use an application that calls the BitBlt function or the StretchBlt function, this problem may also occur.

This problem occurs because of an error in the Win32k.sys file.

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.

Important Windows Vista and Windows Server 2008 hotfixes are included in the same packages. However, only one of these products may be listed on the �Hotfix Request� page. To request the hotfix package that applies to both Windows Vista and Windows Server 2008, just select the product that is listed on the page.

Prerequisites

To apply this hotfix, the computer must run one of the following:

• Windows Vista
• Windows Vista Service Pack 1
• Windows Server 2008

Restart requirement

You do not have to restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace any other previously released hotfixes.

Registry information

To use this hotfix, you do not have to make any changes to the registry.

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 versions

Windows Vista SP1 and Windows Server 2008, 32-bit versions

Windows Vista, 64-bit versions

Windows Vista SP1 and Windows Server 2008, 64-bit versions

Windows Server 2008, Itanium-based versions

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

For more information about the BitBlt function, visit the following Microsoft Web site:For more information about the StretchBlt function, visit the following Microsoft Web site:For more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base: