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Windows Update Servers Slowed By Rush To Patch: Page 3 of 4

"What's different this time that would overload the servers? Two things. All the issues relate to Windows, so that increases the priority of downloading patches. And then there was the sheer number of patches that needed to be downloaded."

Tuesday's 20 vulnerabilities -- released in four alerts -- were an unprecedented number, and easily beat any earlier "record" for the most from Microsoft in one day.

"Just use Occam's Razor (the idea that the simplist explanation is the most likely) ," Wilcox said. "The heavy traffic was because of the large number of vulnerabilities. A lot of traffic and you get server slowdowns."

Wilcox also took Microsoft to task for what he called "security by PR" in consolidating multiple vulnerabilities into single bulletins. On Tuesday, two of the four alert bulletins contained a whopping 15 vulnerabilities.

"They're trying to make things seem better than they are," said Wilcox, by grouping several vulnerabilities under one bulletin's umbrella. "That may be good PR, but it's not necessarily good for IT managers trying to patch systems. They need as much information as they can get, as clearly as they can get it.