Windows Vista, why you should go back to Windows XP

Or better yet, Linux. Or buy a Mac. Take a look at these articles.

A Windows Vista computer is completely unsuitable for any critical application because it can be degraded and/or disabled by any number of events, deliberately by Microsoft, by malicious software, or even by power fluctuations and similar events.

Windows Vista - Broken by Design
Vista - Arrogance & Stupidity