After clean or upgrade installation of Windows 7, installation of all drivers (including Dolby, EM and Audio drivers). Dolby Button is not working.
The above symptom may occur on the following systems:
IdeaPad Y450, Y550, Y650
This happens because for some reason audio driver is not automatically installing DCC (Dolby Control Center). Here are steps to overcome this issue:
Lenovo, Lenovo 3000, IdeaCentre and IdeaPad are trademarks of the Lenovo Corporation in the United States, other countries, or both.
Microsoft and Windows are trademarks of Microsoft Corporation in the United States, other countries, or both.
Other company, product, or service names may be trademarks or service marks of others.