The last time I saw a Microsoft update 'break' anything was XP SP2,
which seemed to cause firewire 800 to slow down to S100 speeds. But
in all fairness, this was due more to an unclear OHCI specification
that failed to clearly define 1394b. Not to mention, Microsoft did
come up with a hotfix for the issue (KB885222) very shortly thereafter.
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So all of the press about Vista breaking software and drivers were just Apple Fanboys?
And you have obviously never worked with their developer tools......