A quick heads up for Vista users looking to improve reliability and squeeze out every bit of performance; Microsoft has just released another update for Vista (both 32 and 64-bit) which takes care of the following :-
This update improves the stability of Windows Vista SP1-based computers by addressing some crashes that may occur when you try to check e-mail by using a POP3 e-mail client such as Windows Mail or Mozilla Thunderbird.
This update improves the reliability of the Windows Vista SP1 based-computers by addressing some problems that occur when you delete user accounts by using the User Accounts item in Control Panel. When this problem occurs, the system may stop responding (hang).
This update improves the reliability of Windows Vista SP1-based computers that experience issues in which large applications cannot run after the computer is turned on for extended periods of time.
This update improves the reliability of Windows Vista SP1-based computers by reducing the number of crashes that may be caused by the Apple QuickTime thumbnail preview in Windows Live Photo Gallery.
This update improves the performance of Windows Vista SP1-based computers by reducing audio and video (AV) stuttering.
You can download the update for both 32-bit (10MB) and 64-bit (14MB) versions here.