Yesterday evening my laptop with Vista already got too slow for normal work that I started to think about reinstalling. But instead I decided to use the performance tools in control panel and I made serious maintenance plus I turned off some features like visual styles.
An improvment in performance was immediate. And then suddenly a baloon pops up from my system tray explaining that there are solutions to my Vista problems (format? :-)). Desiring the better performance I follow the link and download the update. For all here's the link to KB article from which you can download the update for 32-bit or 64-bit Windows Vista.
http://support.microsoft.com/default.aspx/kb/941649
After installing the patch and restart - the difference is obvious. Performance is better.
The best performance improvement I notice is that my SharePoint Designer crashes immediately instead of freezing for 2 minutes first :-)