After upgrading win8 video no image only sound solution

        I bought Sony's VPCEA38EC at the beginning of the year. Recently watched Microsoft's offer upgraded win8 Professional Edition. Unexpectedly, after the upgrade, the video was found to have only images and no sound. When I look at the Internet, many people have encountered this kind of problem. And my notebook ATI graphics card, said that the Sony customized version, the official does not support updates. —— I am depressed. Someone said on the Internet, such as this, I tried not to use. I snorted on Weibo and @索尼中国. Did not think of people reply, gave a link and customer service phone (in fact, I did not want to find, are the help of the official website and 400 customer service). I arrived at the company early this morning and used the company's fixed words to fight. It’s just that people go to work at 9:00. First, a man is connected. After talking about the problem, let me wait for him to check but not let me hang up. But after a while, the phone broke off and didn't know what was going on. Then I dialed in again, this time a female pick. I told the question a bit. She gave a method. I came back to try it tonight and solved it. Just install Microsoft's basic display adapter driver.