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ITsVISTA KB-Link: KB958572

Windows Server 2008 and Windows Vista will not fall back to legacy interrupt support from MSI-X interrupts after a firmware downgrade

Consider the following scenario. You downgrade the firmware of a device that supports MSI-X interrupts to firmware that only supports Legacy Line-based hardware interrupts.

For more information on this issue, including potential causes, workarounds, and resolutions, see: Microsoft KB Article KB958572.

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