1. After ensuring that there are no Trojan viruses in the system, use the system file repair tool provided by Keniu Antivirus to perform a comprehensive system file restoration and repair, which can solve the problem of no sound on the computer.

3. Right-click My Computer----Properties---Hardware----Device Manager, open the sound, video and game controller to see if there is any problem, that is, check if there is any yellow in front of it. If so, reinstall the driver of this device to solve the problem.

4. When there is sound but no small speaker, open the Control Panel - Sound and Video Devices - Volume, and put a check mark before placing the volume icon in the taskbar.

5. When there is no sound or speaker, open the Control Panel----Add and Remove Programs----Add and Remove Windows Components, put a check mark in front of Accessories and Tools, and click Next. Then, shut down and restart. The system will prompt you to install new hardware. Just follow the prompts to install it.

6. Uninstall the sound card driver and reinstall or upgrade the audio driver.