First, the Trojan virus destroys the necessary components or files of QQ music, resulting in the failure to log in QQ music.

second, the firewall of Windows system (or other security software) has adopted the strategy of preventing the QQ music program from connecting to the network after updating, which makes QQ music unable to connect to the network normally, so login can make it up.

Third, there is a problem with the local network connection (for example, slow network will lead to this problem) or the version information of QQ program is incompatible during the update process.

The solutions to these problems are as follows:

1. Trojan virus is the most likely cause of QQ music login failure. If you find this phenomenon in your computer, you are advised to use free antivirus to conduct a comprehensive system scan and clean up the Trojan virus rooted in your computer. Uninstall QQ music and then reinstall the program.

2. For the second case (firewall interception), please check the local firewall settings and lift the restrictions on QQ music.

3. The problems brought by network connection need to be solved by contacting relevant institutions.