Is the download speed of Vista multithreading slow? How experts can solve this problem

In Windows Vista, Microsoft introduced a new feature named "auto tuning" for TCP/IP. In theory, "auto tuning" can be adjusted and optimized based on network application conditions, this increases the network transmission rate. In the default settings of Windows Vista, "auto tuning" is automatically enabled.

However, in practical applications, "auto tuning" sometimes does not play the expected effect, especially when the network adapter uses a third-party driver, it may even greatly reduce the network connection rate.

According to the specific situation of the system, the specific failures caused by "auto tuning" include slow logon to Live Messenger or even failure to log on, and slow browsing of shared resources in the LAN environment. In addition, many people also found that, in Windows Vista, multi-thread download tools such as flashget and Bt are used in applications with multiple concurrent connections, the download speed is significantly lower than that in Windows XP.

Of course, not all such faults are caused by "auto tuning. However, in general, we should first disable "auto tuning" to check whether the situation has been improved.

To disable auto tuning, follow these steps:

First, run the command prompt as an administrator (1 ):

Figure 1 run a command prompt as an administrator

Then enter the command "netsh int TCP set global autotuninglevel = Disable" (excluding the quotation marks). If "OK" is displayed after the carriage return, the operation is successful (2 ):

Figure 2 "OK" indicates that the operation is successful (click to view the big picture)

TIPS:

If the fault persists after "auto tuning" is disabled, it may be caused by other reasons. You need to check the settings further. In this case, you can re-enable "auto tuning" and run "netsh int TCP set global autotuninglevel = normal" in the preceding command line window.

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