Microsoft Security Advisory (2506014): Update for the Windows Operating System Loader -...


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Revision Note: V1.0 (April 12, 2011): Advisory published.
Summary: Microsoft is announcing the availability of an update to winload.exe to address an issue in driver signing enforcement. While this is not an issue that would require a security update, this update addresses a method by which unsigned drivers could be loaded by winload.exe. This technique is often utilized by malware to stay resident on a system after the initial infection.

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