Speed up bit torrent downloads in Vista
 

On my Vista install, I've noticed that BitTorrent downloads are not as fast as they were for me in XP. From what I can gather, this reduction in speed is due to difference in the AutoTuning function that Vista uses on the TCP/IP stack. The optimizer actually results in slower downloads. This affects BitTorrent and other programs that make use of threaded downloads.

If you are seeing slow downloads in BitTorrent too, you can disable the AutoTuning in Vista, this worked for me. To disable the Autotuning, follow these steps.

1. Click on the Start menu and type cmd in the search box. But DO NOT hit Enter after typing cmd. Instead, hold down the Control and Shift keys, and hit Enter while still holding them down. This opens the command prompt with elevated privileges.

2. In the command prompt, type netsh int tcp set global autotuninglevel=disable and then hit enter. It should respond with a line that says Ok.

3. It Windows, so you know naturally need to reboot.

Making this change should speed up your BitTorrent downloads, but if it messes up something else as a result, you can always revert the change by following the same steps but replacing the command in the command prompt with netsh int tcp set global autotuninglevel=normal

Happy downloading!

Weird, the speed is the same for me on Vista as it is on XP. I always max out my private torrents.

same with me no difference in speed

using uTorrent, no difference in speed.

What router are you using?

I had the same issue before I learned how to port forward

^ Never had to port forward, always had uPNP enabled on my router.