As Windows 7 limits the torrent and p2p download speed to 10 concurrent half-open outbound TCP connections only for network security purpose. As normal, this concurrent half-open outbound TCP connections limitation doesn’t effect to normal computer user but frequent p2p and bit torrent users may find some downloading speed issue.
To resolve TCP/IP limitation, i have gathered some small windows 7 patching software to remove the concurrent half-open outbound TCP connections limitation. Which you can optimize and speed up the uploading and downloading transfer speed of BitTorrent and eD2K peer-to-peer (P2P) protocol on Windows 7.
Beside that, this windows 7 patching software also increasing popular P2PTV performance such as TVants, PPStream and PPLive to stream the video channels faster and more smoothly, enhancing viewing movie or soccer match experience.
Remove concurrent half-open outbound TCP connections limitation Tools on Windows 7:
TCP z – Windows 7 tcpip.sys patches utility
TCP-Z is a Software patching utility and patches tcpip.sys by increasing the limit imposed on concurrent half-open outbound TCP connection attempts.

Download TCP-Z for Windows 7 x86
Half Open Limit Fix – Change Windows 7 concurrent half open outbound TCP connection numbers
Half-open limit fix can change the maximum number of concurrent half-open outbound TCP connections (connection attempts) in the Windows 7 system file tcpip.sys. After you changes the value of maximum outbound TCP connection, hyst restart your Windows 7 OS to allow the changes take effect.

Beside that, Half Open Limix Fix also supports Windows XP SP1 (x64) /SP2( x86,x64) /SP3, Vista without SP(x86,x64) and with SP1(x86,x64), Windows 7 beta(x86,x64).
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{ 5 comments… read them below or add one }
Woa, good work, keep up this !
Well the Final Windows 7 does not limit half open connection!!!.
so you really dont need to patch it…
works like a charm…went from 10kb/s to 600 kb/s
This don’t work with the newest version of Windows7 (64 in my case.)
“The patch is not required, because this Windows version has no limit of half-open connections quantity.”
Half-open_limit_fix_4.1 :
Operating system: Windows XP SP1(x64)/SP2(x86,x64)/SP3, Vista without SP(x86,x64) and with SP1(x86,x64), 7 beta(x86,x64).
Interface language: English, Arabic, Chinese (Simplified and Traditional), Czech, Estonian, French, German, Greek, Hebrew, Italian, Japanese, Korean, Norwegian, Polish, Portuguese (Brazilian and European), Romanian, Russian, Spanish, Swedish, Thai, Turkish and Ukrainian. (help translate)
Size: 256KB.
I have Windows7 Home Premium, 32bit version, and I get the same message:
“The patch is not required, because this Windows version has no limit of half-open connections quantity.”
So, the half-open limit doesn’t seem to be needed, until my further tests prove otherwise.