Windows XP users who uses bittorrent actively might have noticed a significant drop in transfer speeds if they installed the latest critical release update from Microsoft dated Jan 8th, 2008. This is because the latest updates installs a new version of TCPIP.SYS, and this reverts the maximum allowable half-open TCP connections back down to 10. After some digging, here are the difference in the version numbers:
- Older TCPIP.SYS version: 5.1.2600.2892
- Newer TCPIP.SYS version: 5.1.2600.3244
Unless a new version of BitComet or any other programs that originally patches the limit automatically is released, one has to raise that number manually in order to optimize one’s bittorrent transfer speed. Here’s how:
- Visit www.LvlLord.de and download the latest EventID 4226 Patcher.
- Unzip and run EvID4226Patch.exe.
- Increase the maximum connections to between 50 – 100.
- Choose Cancel when prompted to insert your Windows XP CD, followed by Yes to whether you want to keep the unrecognized file versions (Print screens below).
- Reboot Windows XP.
This should return the transfer speeds to its previous glory. Enjoy~
Solution adapted from FileShareFreak.com.