From Windows SP2 onwards, Microsoft has implemented a patch that limits the number of half-open TCP/IP connections to 10 per second. Microsoft said that it was applied to limit the propagation speed of worms.
Nevertheless, this limit is not enough for power users, especially for those who use P2P programs, multiple browser sessions, etc.
To circumvent this limit, you may use
this patch.
How to patch:- Download and extract the patcher from this link.
- Run the TCPIPPatch.exe.
- When prompted, "Do you really want to change the limit to 10?", press "C".
- "Please enter the number of concurrent half-open connections". The setting before was set to more than 65,000. Type in 65000 then hit "Enter". (If you still find your browsing too slow while downloading something in uTorrent for example, then you may set a higher value.)
- "Do you really want to change the limit to 65000?", press "Y".
- "May the files be renamed until end of patching", hit "Y".
- When prompted this dialog, choose "Cancel".

- And then choose "Yes" in this dialog.

- Done. Restart. Repair your LAN connection and then observe your browsing speed.
- If you encounter any problems revert back to the old version by following these steps: Run the patcher again, then choose "U" (Un-install), and then restart.
That's it. ^__^