An update is available that improves the compatibility, reliability, and stability of Windows Vista

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