Fix to copy large files in Vista faster

Maybe you have already encountered the strange behavior that it takes much longer to copy large files in Windows Vista than in Windows XP. You thought that the change from XP to Vista would at least be not a disadvantage speed wise but Vista somehow seems to have a problem copying large files. This happens especially with mapped drives but it could also be that you witness network disconnects.

The problem is caused by a new feature called Auto Tuning which is by default enabled in Microsoft Windows Vista. What Auto Tuning does is that it reacts on changes in the network by tuning the receive windows size. The solution would be of course to disable Auto Tuning in Vista. Some users reported that disabling Auto Tuning had a positive effect on their ability to connect to services such as Windows Live Messenger which did not work before.

To disable Auto Tuning and speed up the copy process and avoid timeouts and disconnects do the following:

Open a command prompt and type the following: netsh int tcp set global autotuninglevel=disabled

To turn it on again: netsh int tcp set global autotuninglevel=normal

found this at: One Tip A Day

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Tags: auto tuning, microsoft windows vista, vista, vista problem, vista slow
Categories: Operating Systems, Windows

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5 Responses to “Fix to copy large files in Vista faster”

1. Kris says:

   September 28, 2007 at 1:44 pm

   Ok. Next problem is how to speed up copying of small files (1-2KB) under Vista. Waiting for solution…
   Best, Kris
2. James says:

   December 15, 2007 at 4:57 pm

   Try the following, this worked for me:

   Go to the Control Panel
   Open Programs and Features
   Click on ” Turn windows features on or off” on the left side of the panel
   Uncheck “Remote Differential Compression”
3. amit bholusaria says:

   March 9, 2009 at 2:28 pm

   heartiest thanks…for solving copying problem…

   there are lot other problems with vista….

   do norton ghost (dos version work wid it?
   how can i back c: partion to another disk so that instead of installing vista and all other software i can just restore the partion..and

Trackbacks/Pingbacks

1. Acelerar el copiado de archivos en Windows Vista says:

   April 24, 2007 at 8:35 am

   [...] un programa que afecta a algunos, no todos, pero sí, a mi me afectó. Según ghacks, el problema es ocasionado por una característica llamada “Auto Tuning” de Vista; y lo [...]
2. Speed-up fix for large file copy in Vista » The PC Doctor’s blog says:

   April 24, 2007 at 1:56 pm

   [...] A couple of readers e-mailed me to point out this possible fix that helps to speed-up large file copy under Vista . [...]