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Help Desk Wednesday, November 22, 2017
Help Desk Home » Operating Systems » Windows Vista » Slow copy & paste over network

1.2. Slow copy & paste over network

Problem

When using copy and paste over a network in Windows Vista it takes a long time to complete and is sometimes unresponsive.

Cause

Auto-Tuning feature in early version of Windows Vista causes this problem when copying files over a network with non-Vista computers.

Solution

Option 1 - Install latest service pack for Windows Vista.

Option 2 - Disable Auto-Tuning feature in Windows Vista.

1. Open up an elevated command prompt.

2. Enter the following command to disable auto-tuning.

netsh interface tcp set global autotuninglevel=disabled

To re-enable auto-tuning enter the following command from the elevated command prompt.

netsh interface tcp set global autotuninglevel=normal

To view the status of the TCP global parameters:

netsh interface tcp show global

More Information

Microsoft KB Article: 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
http://support.microsoft.com/kb/932170

Microsoft KB Article: How to disable the TCP autotuning diagnostic tool
http://support.microsoft.com/kb/967475

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