TCP-Z is a free tool that can be used to raise the limited of half-open (incomplete outbound) TCP connection, release the power of your network, download faster, and more task can be run at the same time.
Features include:
1) Safe and Easy: Modifies Tcpip.sys in memory. The changes take effect immediately; do not need to restart the computer.
2) Wide Compatibility: It searches limited offset through signature, no longer focused on the MS upgrade and update. Support all versions of Windows, Which with half-open limited.
3) Professional Chart: TCP-Z shows numbers of established connection; half open connection, Create depth, download / upload speed in real-time. And software will show the number of warnings events in per-minute, which TCP half open connection overload.
More information and download