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ITsVISTA KB-Link: KB968991

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.

There is a download that resolves this issue. See Hotfixes for details.
32-bit Download: Contact Microsoft
64-Bit Download: Contact Microsoft

For more information on this issue, including potential causes, workarounds, and resolutions, see: Microsoft KB Article KB968991.

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