When you copy large files to or from earlier operating systems, the copy operation may be slower than expected on some Windows Vista-based computers
- On a Windows Vista-based computer, you copy files to or from another computer on a network.
- This other computer is a Windows XP-based computer or a Windows Server 2003-based computer.
- These files are each 100 megabytes (MB) or larger.
- You use Windows Explorer to copy the files. For example, you use a drag-and-drop operation in Windows Explorer to copy the files.
Method 1: Disable the Windows Explorer Navigation PaneTo disable the Windows Explorer Navigation Pane, follow these steps:
- Click Start, and then click Computer.
- Click Organize, point to Layout, and then click Navigation Pane.
Method 2: Map a network driveMap a network drive to the folder that contains the files that you want to copy. To do this, use one of the following methods:
Method A: Use the Windows user interface
- 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.
Method B: Start a command prompt, and then map the drive by using net use command
- Click Start, type cmd in the Start Search box, and then click cmd in the Programs list.
- Type Net use x:\\computer_name\shared_folder_name, where x: is the letter of the drive that you want to assign to the shared resource.
- Press ENTER.
Method 3: Use RobocopyUse the Robocopy utility that is included with Windows Vista to copy the files. For example, type the following command at a command prompt, and then press ENTER:
Method 4: Disable the automatic adjustment for the TCP window size on the network
Method ATo have us disable auto-tuning for you, go to the "Fix it for me" section. If you would rather disable auto-tuning yourself, go to the "Let me fix it myself" section.
Fix it for meTo disable auto-tuning automatically, click the Fix this problem link. Then click Run in the File Download dialog box, and follow the steps in this wizard.
Note this wizard may be in English only; however, the automatic fix also works for other language versions of Windows.
Note If you are not on the computer that has the problem, you can save the automatic fix to a flash drive or to a CD, and then you can run it on the computer that has the problem.
We would appreciate your feedback. To provide feedback or to report any issues with this solution, please leave a comment on the "Fix it for me" blog, or send us an e-mail message.
Let me fix it myself
- Click Start, click All Programs, and then click Accessories.
- Right-click Command Prompt, and then click Run as Administrator.
If you are prompted for an administrator password or for confirmation, type your password, or click Continue.
- At the command prompt, type the following command, and then press ENTER: netsh interface tcp set global autotuninglevel=disabled
- Exit the Command Prompt window.
- Restart the computer.
Method BEnable the "offload checksum" function of the network adapter. For information about how to do this, contact the manufacturer of the network adapter.For information about how to contact the manufacturer of the network adapter, visit the following Microsoft Web site:
For more information about the meaning of the offload checksum, visit the following Microsoft Web site:
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Article ID: 932170 - Last Review: 07/08/2009 21:01:37 - Revision: 4.1
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