Consider the following scenario: you have a computer that is running Windows Vista or Windows Server 2008. Intel I/O Acceleration Technology (I/OAT) is enabled on the computer. You copy files to this computer from another computer that is running a down-level operating system, such as Windows XP and Windows Server 2003. In this scenario, the file copying is significantly slower than when Intel I/O Acceleration Technology is disabled. Affected customers will have to contact the software giant and grab a hotfix.