File copying from down-level systems to Windows Vista or Windows Server 2008 is significantly slower if Intel I/OAT is enabled
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.
For more information on this issue, including potential causes, workarounds, and resolutions, see: Microsoft KB Article KB968991.