Download Update for Windows Mail Junk E-mail Filter for x64-based Systems [April 2012] (KB905866) from Official Microsoft Download Center

Update for Windows Mail Junk E-mail Filter for x64-based Systems [April 2012] (KB905866)

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Install this update for Windows Mail to revise the definition files that are used to detect e-mail messages that should be considered junk e-mail or that may contain phishing content.