The patches, expected to be issued Tuesday, address core issues like performance, reliability, and stability of the nearly year-old operating system.
One update aims to improve battery life on mobile devices, boost stability of wireless connections, and improve the operating system's response time following a period of inactivity.
A second patch deals with the operating system's interactions with USB ports, in particular when systems wake from sleep or hibernation, issues that cause 1 percent to 2 percent of all reported crashes, Microsoft said.
The final software update deals with the Windows Media Center component of Vista Home Premium and Vista Ultimate, offering fixes for the way the software interacts with an Xbox 360 that is acting as a Media Center extender.
The updates will also be included in the first service pack for Vista, due next year.