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The six critical updates affect Windows, Office (both Mac and PC), Internet Explorer, Microsoft XML Core Services and its Visual Basic development software. These updates fix vulnerabilities in the software that could allow hackers to run malicious code on remote machines.

The other three updates are marked as important. Two flaws in Windows and Windows Vista also allow remote code execution, while a third, affecting Virtual PC and Virtual Server products can allow a hacker to gain elevation of privileges on a target host.

The company will also release an update to its Windows Malicious Software Removal Tool as well as releasing four high-priority non-security updates on Microsoft Update and two on Windows Update.

Last week, Microsoft released two updates to Vista in a bid to bolster performance and reliability in the mammoth operating system. Also several fixes will resolve compatibility problems.

More details on the fixes can be found here.