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Computer Weekly has also learnt that one patch (MS04-028) in the update could fail if installed on a machine running XP SP2.
Phil Cracknell, chief technology officer at security firm netSurity, said the patches were not related to one particular protocol in Windows systems. "This makes it difficult for IT managers to know how to apply a patch. Users will need to take down their whole IT system," he said.
Russ Cooper, senior scientist at TruSecure, said the problem patch affects Windows XP SP2.
"One of the patches requires the user to press a button to install, but since the patch is only applied when the machine is shutting down, it is not possible to use a mouse or keyboard to do this," he said.
Microsoft said it has taken the patch out of Automatic Update.