1. Do not install Thunder in the system partition: The system partition is the "home" of the Windows operating system. Every time a task is performed, this partition must be scanned. The default installation of Xunlei is the system partition. You can install it to other partitions during installation, which can avoid affecting the system stability and improve the execution speed of Xunlei to a certain level. Same as above, do not specify the default download directory in the system partition.

Slow download speed

2. Modify the number of system TCP connections: For security reasons, Windows XP SP2 limits the number of TCP connections to 10 at most, but this affects the download speed and has a greater impact on BT downloads. Xunlei comes with the "XP System Optimization Tool" (in the "Tools" menu of Xunlei). It is recommended to change it to a maximum of 1024 and then restart the computer.

3. Optimize the configuration of Thunder parameters: In the Thunder configuration items, the disk cache should not be too large. If it is too large, it will occupy more physical memory and affect the execution speed of the system. It is recommended that users with less than 512M of memory set the setting lower than 4096K. The thread should also be fully opened.

4. Don’t open too many tasks, preferably less than 3 simultaneous tasks.

5. Turn off the “anti-virus after downloading option”: Kaspersky’s real-time monitoring is sufficient for downloading and downloading files. Generally speaking, movies do not contain viruses. Most of the files that contain viruses are files in rar and exe formats. It is recommended that experienced users turn off the "check for viruses after downloading option". This option only drags down the system when downloading multiple files. Users of other anti-virus software can consider turning it off.

6. Limit upload speed: Not limiting upload speed will greatly reduce your download speed. If your Xunlei download speed is unstable, you can check the article "Why is my Xunlei download speed unstable?" After testing, when the upload speed is limited to 1KB/S, the download speed is more than 250K/S. If there is no limit, it drops to 80~100K/S. It is recommended to limit the upload speed to 1~5KB/S.

7. Stop BT upload: After the BT download is completed, the 5.6 beta version will continue uploading for at least 30 minutes by default. Currently, users can only manually pause the upload after the BT task is completed. For users with relatively high upload speeds, pausing uploads will increase download speeds for other tasks.

8. Use the "Pause"-"Start" button in a timely manner: Sometimes, the task searches for more than 100 resources, but the speed is reduced. At this time, you can pause the task first and then start it to let the server search for resources again. The speed increased significantly. This method is 95% effective.

The above are the methods to solve the problem of Xunlei download speed getting slower and slower, including the number of download tasks, upload speed, BT upload, optimized configuration of Xunlei parameters, etc. Most of the reasons are caused by the excessive number of tasks, so some download tasks should be paused. The speed will increase.