Fix to copy large files in vista faster

Yes, the title is correct ! Vista has problems with copy 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.

Here are workarounds from Support Microsoft website to of from earlier OS.

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