You experience low performance when you access many small files on an SMB version 1 protocol-enabled remote server from a Windows Vista or Windows Server 2008-based client computer
You have a client computer that is running Windows Vista or Windows Server 2008. You use this computer to access a remote server that has the Server Message Block (SMB) version 1 protocol enabled. When you access many small files on the remote server over a network that has high latency, you experience low performance on the computer.
Note: SMB is more frequently known as Common Internet File System (CIFS).
For more information on this issue, including potential causes, workarounds, and resolutions, see: Microsoft KB Article KB981964.