I spent most of today tweaking my pc for fast shutdown, increased performance and fast boot up. I found that with many tweaks I had increased my pc's performance considerably. The start up and shutdown times were almost nothing and applications seemed to open faster than ever. One thing though, why don't those people at Microsoft (our friend B.G) just apply these (mainly windows tweaks) themselves. It seems so stupid not to.
If you do want to tweak your pc go to click here (mainly for Windows XP)and click here (all Wndows). I recommend the forst link, excellent tweaks here for Windows XP Pro and Home. HAPPY TWEAKING