I experience poor slow copy file performance over the network in Windows Vista. After i googling, i found that “Remote Differential Compression” may cause of that.
Remote Differential Compression is a Windows feature introduced in Windows Server 2003 and is available on all later versions of Windows. This Windows feature is enabled by default in Windows Vista.
Remote Differential Compression (RDC) allows data to be synchronized with a remote source using compression techniques to minimize the amount of data sent across the network. RDC is different from patching-oriented differencing mechanisms, such as Binary Delta Compression (BDC), that are designed to operate only on known versions of a single file. BDC requires the server to have copies of all versions of the file, and differences between each pair of versions are precomputed so that they can be distributed efficiently from a server to multiple clients.
So to fasten, try follow this steps,
First, turn off “Remote Differential Compression”, go to Control Panel | Turn Windows features on or off, then find and uncheck “Remote Differential Compression”.
Next step, open a command prompt and type,
netsh interface tcp set global rss=disabled
netsh interface tcp set global autotuninglevel=disabled
Final step, restart computer