Last night while browsing across the internet I found new updates of MacAfee antivirus. So I downloaded the new updates and installed it. My system was working fine after the installation of new updates. When I started the system in morning, opened the media player for playing music then I found that while playing the song there has been no sound from my Boston Acoustics BA735 speaker. I tried to restart the system so that the speaker problem may be fixed but failed. I need a solution so that I can troubleshoot this problem.
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