ThinkpadE431 upgrade win8.1 after the boot Dolby pop-up window how to solve

Resolve the problem of booting Dolby popup after upgrading win8.1

1. Right click on this computer and click "Manage" Go to Computer Management

2. Then click on the "Device Manager" on the left and then double-click "Sound, Video & Game Controller"

3, right click on this and select Uninstall popup dialog there. Have to check the

4, then unload it, click on the restart immediately after the last boot, right click on the small speaker inside the system tray, click on the play settings and then double-click the speaker pop-up speaker settings, click on the enhancement function to set it into and The last click on the figure is OK, the measured effect is no different from Dolby and simple