Windows 8.1 upgrade to installed Windows 8

  Puzzled of Kenley 20:02 10 Feb 2014

I downloaded windows 8.1 on my wife's Lenovo G780 laptop which came with Windows 8 pre-installed. Before it is possible to do anything a pop up containing the following message now appears- "Unable to start the Dolby audio driver. Please restart the computer or reinstall the driver if problem persists."

The latest drivers have been installed from both Dolby and Lenovo website (for Conexant Audio Driver) but the message appears still at every start up.

Can anyone help please?

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