This path can Increase TCP Connection Limit under Vista, Windows Vista TCP/IP (tcpip.sys) and UAC Auto Patcher is a simple batch command script that automatically replaces and overwrites original tcpip.sys in \Windows\System32\Drivers\ folder with a patched tcpip.sys version (included) that has been modified and cracked to unlock and remove the limit imposed on concurrent half open TCP/IP connection attempts that Vista can launch at any one time. Patching the tcpip.sys to remove the restriction potentially yields benefits or solves problems as below.

Event ID 4226 in Event Viewer that describes TCP/IP has reached the security limit imposed on the number of concurrent TCP connect attempts (more info).
Slow browsing speed such as web page unable to load or refresh when using P2P applications such as BitTorrent (BT) clients and eD2K eMule client.
Improve torrent speed and fix slow or even not moving downloading and uploading speed when using P2P programs. (see how to optimize torrent speed in Vista)
Prerequisite to Use Vista tcpip.sys and UAC Auto Patcher

Microsoft has released plenty of versions of tcpip.sys, thus each different versions of Windows Vista TCP/IP and UAC Auto Patcher will work only on certain version of Windows Vista, depending on the variant of tcpip.sys installed. To check the version of tcpip.sys, navigate to \Windows\System32\drivers folder, right click on tcpip.sys and select "Properties", and the version info will be listed in "Details" pane.

Features of Vista tcpip.sys and UAC Auto Patcher
1. Automatically copy and replace tcpip.sys with patched version that unlock TCP/IP connection limit.
2. Set the maximum concurrent half-open TCP connection attempts to 50,000.
3. Disable User Account Control (UAC).
4. Disable Vista TCP Auto Tuning feature to minimize possible networking problems.

About This version:
For Windows Vista SP1 with tcpip.sys version 6.0.60001.18063 or 6.0.6001.22167 (Support both x64 and x86 Windows Vista SP1 - check the version of system tcpip.sys located in \Windows\System32\drivers folder, and run Install32-18063.bat or Install32-22167.bat for 32-bit Vista or Install64-18063.bat or Install64-22167.bat accordingly.)


The license of this software is Freeware, you can free download and free use this ip utility software.