A Windows Vista-based or Windows Server 2008-based computer that has a Secure Digital memory card slot enabled stops responding when you try to put it into either standby or hibernation
Assume that a Secure Digital (SD) memory card slot is enabled on a Windows Vista-based or Windows Server 2008-based computer. When you try to put the computer into either standby or hibernation, the system stops responding (hangs).
This problem occurs randomly.
For more information on this issue, including potential causes, workarounds, and resolutions, see: Microsoft KB Article KB955249.