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| Microsoft on Friday warned that cyber criminals may be taking advantage of an unpatched flaw in the Windows operating system to install malicious software on a victim's PC. |
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| "Do not open or save Word files that you receive from untrusted sources or that you receive unexpectedly from trusted sources," Microsoft said in a security advisory posted to its Web site late in the day. |
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| Users of many versions of Word, including Word 2007, 2003, 2002, and 2000 are at risk, unless they are running Windows Vista OR Windows Server 2003, Service Pack 2. Those two operating systems include a newer version of the Jet Database Engine that does not have the bug, Microsoft said. |