Windows XP was affected by the most vulnerabilities of all: 24 out of 34, or 71 percent of the total. Of the two-dozen bugs that needed patching in Windows XP, 18 were tagged as critical, or 86 percent of the total critical count.
The tallies indicated that, at least this month, Windows 7 was afflicted with about half as many vulnerabilities as was Vista, and about a third as many as was Windows XP. Its critical bug count followed the same pattern.
all o/s need updating especially new 1s,the discs sent out are already "old" since the final w7 code was finished ages ago.