Some solutions for slow copy

1. Disable the automatic adjustment (Auto Tuning) for the TCP window size on the network. To do this, follow these steps: Click Start , type cmd and press Enter. Type netsh interface tcp set global autotuninglevel=disabled at the command prompt, and then press ENTER. Or this how to: IPCONFIG and Network Settings.

2. For the test, disable IPv6. Refer to this how to: IPCONFIG and Network Settings

3. Test and modify the MTU settings. Refer to this page: Vista MTU Issues

4. Disable Offline Files if it is enabled. Please refer to this how to: Vista Offline Files

5. Disabling Remote Differential Compression. To do this, open Control Panel>Uninstall a Program>Turn Windows features on or off, uncheck Remote Differential Compression.

6. Vista Index can be the issue too. If the Index have more collections, it will run more faster. You can modify the Index options. Or for the test, disable the Index feature from Add/Remove Applications.

7. If you have external drive, try to upgrade the latest firmware.

8. Also security and anti-virus can be the issue too. Make sure the software is Vista compatible. To test it, disable them temporarily. Check this post: Vista slow may cause by security software

9. Check the hardware such as NIC and switch settings. Make sure the speed duplex are matching.

10. Microsoft has an update is available that improves the performance and reliability of Windows Vista
http://support.microsoft.com:80/?kbid=938979.

11. Add the CopyFileBufferedSynchronousIo registry entry. Please refer to this post: Vista Slow Issues Solution.

12. Install latest NIC driver.

13. Disable SMB 2.0 on Windows Vista. Please refer to this post: Vista slow because of MTU

Disable the Windows Explorer Navigation Pane. To do that, Click Start, and then click Computer. In the top menu, select Organize, Layout, and then click Navigation Pane.

12. Map a network drive to the folder that contains the files that you want to copy. To do this, you may have two options.

1) Click Start, right-click Computer, and then click Map Network Drive. Type the path of the network folder in the Folder box, and then click Finish. For example, type \\computer_name\shared_folder_name, and then click Finish.

2) Start a command prompt, and then map the drive by using net use command, for example, Net use H: \\chicagotech/shared, where H: is the letter of the drive that you want to assign to the shared resource.

13. Use Robocopy or xcopy. For example, type the following command at a command prompt, and then press ENTER: Robocopy source_path destination_path file_name

Hangs when copying a large file to network drive on Vista
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Vista: Calculating Time Remaining
Vista "estimated time remaining" takes a long time
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Vista MTU Issues
Vista: The copy process may stop responding (hang)
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Mapping a network drive in Vista is extremely slow
Microsoft has a update that may fix this issue. Or check these posts. Vista: Slow Network PerformanceHome Vista: Slow Network
 ...
http://www.chicagotech.net/netforums/viewtopic.php?p=2117

Mapping a network drive in Vista is extremely slow
I suggest sticking with the Vista supplied driver and not the newer windows update driver, it solved all my problem for me anyway...
http://www.chicagotech.net/netforums/viewtopic.php?p=2117

The following links may help too.

Vista: very slow to copy large files
http://www.chicagotech.net/netforums/viewtopic.php?t=576

Vista: Slow Network Performance
http://www.chicagotech.net/netforums/viewtopic.php?t=583

Slow file Transfer From Xp to Vista Machine
http://www.chicagotech.net/netforums/viewtopic.php?t=584

Vista: slow or hang when copying
http://www.chicagotech.net/netforums/viewtopic.php?t=577

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