When you have nothing to say, say it
Microsoft's "When you have nothing to say, say it" ad campaign was very "Vista" like. It wasted money, was confusing, showcased Microsoft's incompetence, had no content, fell flat, and was removed from criticism at the first opportunity.
The earlier ad campaign could be summarized this way:
"When you have ugly children, don't take pictures." (Show your O/S to strangers and non-professionals to garner praise.)
The up-coming ad campaign -- following Microsoft's corporate response to industry criticism of Vista -- should attack Apple. The tag-line for the next ad campaign should be:
"When you fail, blame the winners."
If Microsoft paid 10,000 highly-creative people to come up with a way to sell their desktop operating system, at least one of them should have suggested...
"Stop selling crap and start selling something that works."
XP Pro comes immediately to mind.