No matter what you think about Beck, is this really funny? Maybe it's just a sick attack. If it was Linus, there would be an uproar here against this site.
Any time I build a fresh PC from a Windows CD (not a recovery disk from a PC maker like Dell), Windows boots very quickly. When you start installing a bunch of apps that load on startup (especially on laptops), it starts taking longer and longer.
I reboot about once a week, and it's usually when I'm done working, not when I'm ready to start.
Real programs don't eat cache.