Win10 system has no sound how to do

Users have eagerly downloaded the Windows 10 technology preview version and completed the installation, found that the computer has no sound, no matter the application or the system sound can not come out. How is this good?
According to feedback from users, this problem may be caused by driver incompatibility.
You can try the following 3 methods to solve:
1. Uninstall the sound card driver and then restart, the system will automatically load the Microsoft driver, the original driver and Win10 9860 are not compatible.
2. Reinstall the driver with software such as driver wizard, driver life, 360 driver master.
3. If it is a brand computer, go to the official website to download the sound card driver and restart after installation.
Windows 10 Technology Preview is a version for developers to test, hobbyist, there will naturally be many unstable and incompatible situations. Although not everyone has encountered a situation where there is no sound after installing the Win10 Technology Preview, it is not recommended for most users.