"March 07, 2007 (Computerworld) -- Microsoft Corp. has acknowledged that a bug in its Windows Live OneCare security suite has been causing users' e-mail to vanish from Outlook and Outlook Express.
The company said a fix is in the works and will be pushed to OneCare users next week.
The OneCare bug, first reported by users writing on a OneCare support message thread six weeks ago, seemed to be deleting Outlook and Outlook Express data files -- .pst and .dbx files, respectively -- after a malware scan.
According to Microsoft, the bug affects Outlook 97 and Outlook 2000, as well as Outlook Express running on Windows XP.
OneCare has fared poorly in recent weeks. Last Thursday, The AV Comparatives Web site rated OneCare as the least effective antivirus defender out of 17 programs. In February, Microsoft had to patch the malware scanning engine in OneCare -- and its other security products -- to make sure attackers could not hijack PCs by feeding them malformed PDF files."
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