This update improves the compatibility, reliability, and stability of Windows Vista. This update includes the following improvements:

•It extends the battery life for mobile devices.

•It improves the stability of portable computers and of desktop computers that use an uninterruptable power supply (UPS).

•It improves the reliability of Windows Vista when you open the menu of a startup application.

•It improves the stability of wireless network services.

•It shortens the startup time of Windows Vista by using a better timing structure.

•It shortens the recovery time after Windows Vista experiences a period of inactivity.

•It shortens the recovery time when you try to exit the Photos screen saver.

•It improves the stability of Windows PowerShell.

This update also resolves the following issues in Windows Vista:

•A compatibility issue that affects some third-party antivirus software applications.

•A reliability issue that occurs when a Windows Vista-based computer uses certain network driver configurations.

Download the update for Windows Vista x86-based versions (KB941649) package now.

Download the update for Windows Vista x64-based versions (KB941649) package now.