As we all know, in order to prevent the spread and attack of worms, Windows XP SP2 limits the number of concurrent threads to a maximum of 10. SP2 uses the Messages dynamic link library to monitor the number of concurrent threads per process in real time. Once it finds that a process has more than 10 threads, it will block some threads. SP2 does this, although it can protect against the worm of the shock wave type and strengthen the system security, but it also has some negative effects. For example, when you use BT, P2P or
Flash
Get software to download, some threads will be Blocked, so the download speed will become very slow. To this end, you can take the following countermeasures to break through the number of TCP concurrent connections, thereby increasing the multi-threaded access speed of SP2.
a, misunderstanding
modify the registry law in order to break SP2 TCP concurrent connections to limit the number of circulated online through a method for modifying the registry, follow these steps:
Click "Start" /Run, enter Regedit to open the registry, navigate to HKEY_LOCAL_MacHINE\\SYSTEM\\CurrentControlSet\\Services\\Tcpip\\Parameters, modify the key value of "TcpNumConnections", change it from 10 to 150, that is, set the maximum TCP The number of concurrent connections is 150.
after the actual test, we found that this method seems effective, but essentially does not limit the number of concurrent connections breakthrough, improve performance of multithreaded access speed SP2. Because SP2 controls the number of threads, it is implemented by the system file "Tcpip.sys", which is not implemented by the registry. Therefore, this method cannot increase the number of TCP concurrent connections of SP2.
Second, the use of tools to replace Tcpip. Sys
In order to break through the SP2 TCP concurrent connection limit, the correct way is to modify the Windows XP SP2 system file Tcpip.sys. Tcpip.sys is an important system file for Windows XP SP2. It is located in the C:\\Windows\\system32\\drivers directory. This file is usually protected by the system, so you can't replace it under normal circumstances. It must be in safe mode or pure. You can replace it in DOS
mode. It is recommended that you use the following special tools to replace the "Tcpip.sys" file. The steps are as follows:
From the Internet http://www.lvllord .de/download.PHP?url=en/EvID4226Patch211a-en.zip
Download replacement tool (only 30KB), use it to modify the system file Tcpip.sys maximum security concurrent connection limit; then backup C:\\Windows \\system32\\drivers\\Tcpip.sys file.
Next, double-click to open the download file ZIP archive, run the replacement tool EvID4226Patch.exe, and then a command line prompt window will pop up, first display the current Windows Tcpip The .sys file version, and the limit value of the concurrent connection (the default is 10); then ask if you limit the number of connections to 50 (as shown in Figure 1 below), you can choose "Yes /No /Change", if you enter "Y" Will be Change the number of connections to "50". If you want to change to another number (for example, 150), you can type "c" at the prompt, then enter the maximum number of concurrent connections (for example, 150) and press Enter. Finally, type " at the prompt." Y" and enter, this replaces the Tcpip.sys file; after the Tcpip.sys file is replaced, the system file protection dialog will pop up, you can click the "Cancel" button, then click the "Yes" button to restart After that, the replacement of the Tcpip.sys file is done!
Figure 1
Now that your maximum number of concurrent connections has exceeded 10, it has reached 150, so the multi-threaded access speed of Windows XP SP2 has been improved. When you use Flash
Get, BT, etc. to download multiple threads, you will not feel the limitation of network bandwidth.
Third, modify the Tcpip.sys file under DOS
The above replacement program EvID4226Patch.exe can also be used under DOS
by first copying EvID4226Patch.exe to the root directory of the C drive; then entering DOS
mode, enter the root directory of the C drive, enter the command EvID4226Patch/L=$n$/w=C :\\Windows\\system32\\drivers/L=tcpip.sys to modify the Tcpip.sys file.
Note: The above $n$ is the maximum number of secure connections you want to set. If you want to set the maximum number of concurrent connections to 150 threads, enter the command EvID4226Patch/L=150/w=C:\\Windows \\system32\\drivers/L=tcpip.sys.
The use of the tools provided with Bitspirit
Bitspirit tool that comes with "TCP /IP connection crack patch" can be replaced Tcpip.sys, the breakthrough SP2 TCP concurrent connection limit.
Download the BitSpirit V2.7.2.225 Simplified Chinese official version from the online http://download.pchome.Net/php/dl.PHP?sid=15504
, then Double-click the download file to install it. You can choose which components to install (Figure 2 below), you should install the "TCP/IP connection cracking patch for Windows XP SP2", after the installation, the XP Start menu will have the BitSpirit program group, click on the " The XPp2 connection number crack patch can be used to modify the Tcpip.sys file.
Figure 2
click the "XP SP2 connection crack patch" pop-up interface of the software, the interface is listed in the current version of Tcpip.sys, and the maximum number of concurrent connections (right 3) You can enter a number in "TCP/IP Linitation" to set the maximum number of concurrent connections, for example, enter 150, and then press the "Apply" button. After restarting the system, your SP2 maximum concurrent connection number is changed to 150.
Figure 3 above, although several methods to improve the access speed multi-threaded Windows XP SP2, but it reduces the security of SP2, if your computer is infected with viruses and Trojan horses, excessive opening of the new thread, It will speed up the spread of viruses and Trojans, so you should pay attention to network security while pursuing the speed of network downloads. It is recommended that you install the upgrade anti-virus software and firewall in time. If it is an ordinary user, you can use the above method to set the maximum number of concurrent TCP connections to 10 to 30, and the BT user can set it to 100 to 150.