http://www.tweakhound.com/vista/tweakguide/page_8.htm
http://www.pctipsbox.com/make-your-h...ve-run-faster/
DEFRAG & DISABLING services/start ups+removing adware will leave you with a good system.
Also remove all that aero crap and put your computer for performance mode. Will boot a lot faster. I did that to my Vista, and even though it loads fast it is still not as fast as my Ubuntu
.