Here's a nice little tune up util. Tried it on my laptop and it increased boot time approx 25%, as clocked by my timer.
The helpfile is a little unusual, as there are no scroll-bars in the window, so just use your mouse/scroll.
http://www.driverheaven.net/dforce/default.php
it's under the GPL and has 4 stars from CNET.
The boot defrag is great.
R