Ah, another one that thinks the word "Critical" means "Largely Optional"...
Admittedly, Microsoft do tend to post silly little updates to upgrade things the average user never uses, and MSN Messenger, Media Player and their ilk is hardly the sort of thing that is vital for a PC to run. What are the crackers going to do, go into your Media Library and replace your heavy metal collection with Britney Spears?
But the critical updates are a whole 'nother matter...