Windows users may have to update their PCs more than once to completely patch one of the vulnerabilities Microsoft fixed last week, the company's support site said Monday.
Security update MS06-061 -- one of five labeled "critical" by Microsoft -- may install multiple versions of the XML Parser or XML Core Services when it's downloaded manually or via an automatic update mechanism. But "if you install a version of MSXML after you install this security update, you may have to install an additional package for this security update," read a Microsoft support document.
That "additional package" can only be acquired by running Automatic Update a second time, said security company Symantec.
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