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How to Download Half-Open TCP Limit Fix for Free and Boost Your Internet Speed

How to Download Half-Open TCP Limit Fix for Free and Boost Your Internet Speed

Do you often experience slow internet speed when using P2P software like uTorrent, BitComet, eMule, etc.? Do you have trouble loading web pages while downloading or uploading files? If so, you might be affected by the half-open TCP limit imposed by Windows.

The half-open TCP limit is a feature introduced by Microsoft in Windows XP SP2 and later versions to prevent the spread of malware and reduce the impact of DoS attacks. It limits the number of concurrent half-open outbound TCP connections (connection attempts) to 10. This means that after 10 connection attempts, any new ones are put in a queue and forced to wait.

Half-Open TCP Limit Fix

This limit can severely affect your internet speed and performance, especially if you use P2P software that relies on multiple connections to download or upload files. You might notice that your P2P software cannot find enough peers or seeds, or that your download or upload speed is very low. You might also notice that your web browsing becomes very slow or even unresponsive.

Fortunately, there is a way to fix this problem and increase your internet speed by changing the half-open TCP limit. You can use a free program called Half-Open Limit Fix to patch your tcpip.sys file and set a new limit for half-open connections. In this article, we will show you how to download Half-Open Limit Fix for free and how to use it to boost your internet speed.

Step 1: Download Half-Open Limit Fix for free

The first step is to download Half-Open Limit Fix for free from its official website. You can use the following link to access the download page:

Half-open limit fix (patch) for Windows - Download

On the download page, you will see some information about the program and its compatibility with different versions of Windows. You will also see a download link for the program file. Click on the link to download the file to your computer.

The program file is named and has a size of about 360 KB. It is a portable program that does not require installation. You just need to extract it from the zip archive using a tool like WinRAR or 7-Zip. You will get a file named Half-open_limit_fix.exe.

Step 2: Run Half-Open Limit Fix

The next step is to run Half-Open Limit Fix on your computer. To do this, double-click on the Half-open_limit_fix.exe file and allow it to run as administrator if prompted. A window will pop up showing you the current limit of half-open connections and the recommended limit of 100.

To change the limit, simply enter a new value in the box and click on Add to tcpip.sys. For most internet users, changing the limit to 100 will be more than sufficient. However, you can experiment with different values and see what works best for you.

After you click on Add to tcpip.sys, a message will appear asking you to confirm that you want to patch your tcpip.sys file. Click on Yes and wait for a few seconds until you see a message saying Patched successfully.

Step 3: Restart your computer

The final step is to restart your computer for the changes to take effect. After you restart your computer, you should notice an improvement in your internet speed and performance. Your P2P software should be able to find more peers or seeds and download or upload files faster. Your web browsing should also become smoother and faster.


Half-Open TCP Limit Fix is a free and easy-to-use program that can help you increase your internet speed by changing the half-open TCP limit imposed by Windows. It can improve your network performance and efficiency, especially if you use P2P software frequently.

Please note that this program is only for personal use and we do not encourage piracy or illegal use of P2P software. If you like Half-Open TCP Limit Fix, you should support its developer by visiting his website and making a donation. e3ff22d237


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