(Computerworld) The contentious stealth update that Microsoft delivered to customers this summer blocks 80 patches and fixes from installing after Windows XP is restored using its "repair" feature, researchers said today.

Scott Dunn, who first reported the problem in a story posted Thursday morning to the "Windows Secrets" newsletter, said that users who reinstall Windows XP with the repair option cannot retrieve the full set of updates from Windows Update (WU). The problem, he said, has been traced to the so-called "stealth update" to WU which Microsoft has acknowledged sending to users beginning in July.

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