Call me a cynic - but sometimes I wonder if these updates are designed to catch out the pirates as well
One of my friends had a slightly less than legal copy of XP - he had some windows activation crack or something installed. It worked without fault for over two months...then he visited a site that required him to install Cyrillic letters (he can speak Russian)...it redirected him to Windows site and trashed his dodgy XP installation...
It makes me wonder if this is a deliberate ploy by MS...