Consider the following scenario:

• You have a computer that is running Windows Vista or Windows Server 2008.
• You specify a user name that is exactly 15-bytes. This user name includes double-byte characters during the Out-of-Box Experience (OOBE) process. For example, you specify “?????12345” as a user name.
• You use the default computer name when you proceed to the next step of the OOBE process. For example, you use “?????12345-PC” as the computer name.

In this scenario, the specified user account defaults to a standard user after the OOBE process is completed. Therefore, the user cannot execute some operations that require administrator permission.

When you start a Windows Vista-based computer, you receive the following Stop error message on a blue screen even though hotfix 946084 is installed on the computer:

0×0000C1F5

This problem also occurs when you start Windows Vista from a Microsoft Windows Preinstallation Environment (Windows PE) 2.1 image.

Note: This issue occurs if the $TxfLog file is corrupted. When this issue occurs, you have to remove the hard disk that contains the corrupted $TxfLog file to start the computer.

This article describes a hotfix rollup for the USB audio driver, Usbaudio.sys, for Windows Vista-based and Windows Server 2008-based computers. This hotfix rollup fixes several problems and provides some improvements for the USB audio driver.

This hotfix rollup fixes the following problems:

• Some legacy USB MIDI devices do not appear in Windows Vista or in Windows Server 2008. These USB MIDI devices correctly appear in Windows XP.
• Some USB Audio devices display incorrect device names.
• In a USB Audio device, you cannot select the output source of a multiplexer (MUX) processing unit.
• A USB Audio device does not log to the same location as the Audio engine does.
• Surprise removal of a USB Audio device causes an application to stop responding or to use 100% of the CPU.
• The USB Audio driver incorrectly maps the center frequency to an incorrect value.
• The USB Audio driver cannot set a specific mode for a processing unit node.

This hotfix rollup includes the following improvements:

• The USB Bus drive can store a device startup failure.
• The USB device can save and restore the MIDI Processing Unit (MPU) state.
• The USB Audio driver can lock the AVStream queue on entry to standby or on exit from standby.
• The process for determining whether a USB Audio device is a communications device has been refined.

Consider the following scenario:

• You are running Windows Server 2003, Windows Vista, or Windows Server 2008 on a computer that has a multi-core processor installed.
• You put the computer to standby, and then you resume the computer.
• You put the computer to standby again, and then you try to resume the computer.

In this scenario, the computer stops responding (hangs), and the monitor never turns on again.

This problem occurs after you apply hotfix 951126 on the computer. For more information, click the following article number to view the article in the Microsoft Knowledge Base:

951126 A multiprocessor computer that is running a Microsoft Windows operating system stops responding on a black screen after you resume the computer from hibernation

Consider the following scenario. On a Windows Vista-based computer, you install a series of hotfixes without restarting the computer. Then, you try to restart the computer to complete the hotfix installation. However, the system may stop responding (hang) while the computer is shutting down. The shutdown process stops responding at the following message:

Windows is configuring the updates

This behavior continues until you manually turn off the computer.

• Description of how hotfixes and updates are managed after you upgrade to a service pack in Windows Vista and in Windows Server 2008
  A way to free up some space when installing updates or service packs that supersede other fixes.
  (tags: Hotfix SP1 Updates )
• Unsupported methods to update a customized image of Windows Vista to a Windows Vista Service Pack 1 image
  If you're looking for ways to do this that are unsupported, here are four that Microsoft suggests.
  (tags: Deployment Image SP1 )

A way to free up some space when installing updates or service packs that supersede other fixes. Keep reading →

After you perform System Restore in Windows Vista, you are unable to install a Windows update, a hotfix, or a service pack. Additionally, you may receive the following error message:

80071A91 (ERROR_RM_NOT_ACTIVE)

A Microsoft Hotfix (K938660) improves performance for Windows Presentation Foundation, which should improve the performance of the beta of Yahoo Messenger. Keep reading →

When you try to apply the hotfix that is described in Microsoft Knowledge Base article 935276 on a Windows Vista-based computer, the attempt is not successful.

Note: The hotfix that is described in Microsoft Knowledge Base article 935276 resolves an installation problem that occurs with Web Services on Devices (WSD)-based devices.