I'm trying to copy DVD's and other large files from one win7 pc where I process and them over to my vista based mediacentre box. I have a Win7 box (source) and a Vista SP2 box (dest). I also have a QNAP TS-209 NAS box on the same network (which is gigabit). Source has a Realtelk PCIe GBE family adaptor (gigabit) Destination has a Realtek RTL8168B/8111 Adaptor (gigabit) Switch between them is a TPLink TL-SG1008D I can open a folder or share on the vista machine from Win7 and browse as normal. When I try a file copy it starts the process and then says "The networth path was not found". The file copy fails. I have tried robocopy using this option: robocopy e:\dvd \\mediacentre\DVDs *.* /S /Z /XN /TBD /R:10 /W:10 /V I get a 0.0% screen and then it times out. The specified network name is no longer available. Waiting 1 seconds... Retrying... New File 1023.9 m VTS_01_4.VOB 2009/12/20 10:13:37 ERROR 53 (0x00000035) Copying File e:\dvd\CALIFORNICATION_S1_D1\VIDEO_TS\VTS_01_4.VOB The network path was not found. ERROR: RETRY LIMIT EXCEEDED. When copying from Win7 to the QNAP NAS box it works fine just using windows file copy, and better using robocopy. When I copy from the Vista box from the QNAP NAS box it works file just using windows file copy, and better using robocopy. So I do have a work around Win7 -> to -> NAS (Linux based) then Vista <- from <- NAS But this is a pain in the ass. Windows should be able to copy directly from machine to machine without having to go through a linux based intemediatary. I have also found it is faster to copy 8GB files to a memory stick, walk it to the other machine, and pop it on there. I thought Gigabit Ethernet was supposed to make things faster? Tips? Ideas? Things in the network card properties I should be setting?