The copy process may stop responding when you try to copy files from a server on a network to a Windows Vista-based computer
On a Windows Vista-based computer, when you try to copy files from a server on a network, the copy process may stop responding (hang), and you may receive a message that resembles the following:
Calculating Time Remaining
0 minutes remaining
This problem may occur only occasionally.
For more information on this issue, including potential causes, workarounds, and resolutions, see: Microsoft KB Article KB2534453.