Optimize and Increase BitTorrent (BT) Download Speed in Vista优化和增加的BitTorrent （ BT ）中的下载速度在Vista

Windows Vista, like Windows XP SP2 or XP SP3, has also limit the number of concurrent simultaneous half-open TCP connections or sync packets that the system can establish at any one time. Windows Vista的一样， Windows XP SP2或XP SP3的，也限制了大量并行的同时半开放的TCP连接或同步的数据包，该系统可以建立在任何一个时候。 To make thing worse, the TCP/IP network protocol stack in Windows Vista has been rewritten so that Vista can auto adapt and optimize network settings according to network connection configuration.使事情更糟的是， TCP / IP网络协议栈在Windows Vista已被改写，使Vista可以自动适应和优化网络设置，根据网络连接配置。 The changes to Vista networking may make peer-to-peer downloading and uploading such as BitTorrent (BT) network crawling at slow speed.更改Vista的网络可能会使点对点下载和上传BitTorrent等（ BT ）中网络检索在速度缓慢。

P2P users using BitTorrent client such as uTorrent, BitComet, ABC, Azureus, or eDonkey network client such as eMule resorts various workarounds in order to speed up the torrents download speed. P2P的用户使用BT客户端，如utorrent ， bitcomet ，美国广播公司， azureus ，或eDonkey的网络客户端，如emule度假村的各种变通方法，以便加快急流下载速度。 Other than the usual port forwarding in router, firewall setting to unblock the BT client or other P2P client, and tweaking of options in the client itself, some users use其他比一般的端口转发的路由器，防火墙设置要解锁BT的客户端或其他的P2P客户端，并且调整的方案在客户端本身，有些用户使用 patched tcpip.sys that remove the half-open connection limit修补Tcpip.sys中表示，消除半开放连接限制 imposed by Microsoft.所施加的微软。

If you don’t want to modify or patch the the tcpip.sys of the system, here’s another workaround which you can try if the change will solve the slow download problem and increase the P2P BitTorrent or ED2K download speed.如果您不想以修改或修补了Tcpip.sys中的系统，这里的另一可行方案，其中您可以尝试，如果改变将解决下载缓慢的问题和增加的P2P或BT的ed2k下载速度。

By default, Vista enables Receive Window Scaling and uses a RWIN (TCP/IP Receive Window) of 256 bytes with a scale factor of 8 (256^2*8=64K bytes) when performing the handshake, which allows the maximum size of RWIN at 16,776,960 bytes.默认情况下， Vista中，使接收窗口的缩放和使用rwin （ TCP / IP的接收窗口）的256字节，与规模因素，第8条第（ 256 ^ 2 * 8 = 64K的字节）时，表演握手，它允许的最大尺寸为rwin在16776960字节。 Some older routers, switches, servers or network equipments do not negotiate the scale factor, and will always communicate with a RWIN of 65536 bytes.一些较旧的路由器，交换机，服务器或网络设备的不谈判，规模因素，将永远沟通与rwin的65536字节。 Thus in when Vista connects with 256 bytes RWIN, the connection speed will have slow start or dropped automatically.因此，当Vista的连接，与256字节rwin ，连线速度将开始缓慢下降或自动。

The following command will set the TCP Auto Tuning feature to highly restricted, which allows the TCP/IP window to grow beyond its default value, and instructs Vista to use RWIN of 16,384 bytes with a scale factor of 2 (16384^2*2=64K bytes), with a maximum size of 262,140 bytes.以下命令将设置的TCP自动调整功能，以高度的限制，这使得TCP / IP的窗口，成长超出其预设值，并指示Vista中使用rwin的16384个字节，与规模因素2 （ 16384 ^ 2 * 2 = 64K的字节） ，最高的大小262140字节。 Open an打开一 elevated command prompt提升的命令提示符 to run the command.要运行该命令。

netsh interface tcp set global autotuninglevel=highlyrestricted 在netsh界面的TCP设置全球autotuninglevel = highlyrestricted

If restricting TCP/IP Auto Tuning level doesn’t help, try the other values possible for the autoTuningLevel parameter:如果限制的TCP / IP自动调谐水平没有帮助，请尝试其他值可能为autotuninglevel参数：

• disabled - Fix the receive window at the default value, which is 65536 bytes RWIN.残疾人-修正接收窗口在预设值，这是6 5536字节r win。
• highlyrestricted - Allow for the receive window to grow beyond the default value, but do so very conservatively. highlyrestricted -允许接收窗口的增长超出了预设值，但这样做非常保守。
• restricted - Allow for the receive window to grow beyond the default value, but limit such growth in some scenarios.限制-允许接收窗口的增长超出了预设值，但限制这种增长在某些情况下。
• normal - Allow for the receive window to grow to accommodate almost all scenarios.正常-允许接收窗口成长，以容纳几乎所有的情况。
• experimental - Allow for the receive window to grow to accommodate extreme scenarios.实验-允许接收窗口成长，以容纳极端的情况。

Reboot the computer after changing this setting.重新启动计算机后更改此设置。 The changing the autotuninglevel will also solve problems such as slow loading of website’s web page, or web site sending data slowly or drops the data completely as described in该改变autotuninglevel也将解决问题，例如缓慢加载网站的网页，或网站发送数据缓慢或下降的数据完全中所述的 KB929868 kb929868 , or other slow connection problem such as ，或其他连接速度慢的问题，如 slow downloading of POP3 email缓慢下载POP3电子邮件 . 。

IMPORTANT : This is a machine translated page which is provided "as is" without warranty. 重要说明 ：这是一个机器翻译网页是“按原样”提供的担保。 Machine translation may be difficult to understand.机器翻译可能很难理解。 Please refer to请参阅 original English article英文原版的文章 whenever possible.只要有可能。

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