I use Chrome with widows 7. With I open Chrome and go to my bookmark, I try to open a file there, the file is from youtube a music Video the file will open and I here the music but I see no Video. WHY? 12-31-2014

Is Adobe Flash Player installed, up-to-date (latest version is 16.0.0.235 which I installed just 4 days ago), and above all, enabled in Chrome? If that's not it, have you used PC TuneUp?

Robert, Assuming that you use AVG have you actually tried disabling AVG to see if it's the guilty party & it works?. Have a look @ this article (https://support.avg.com/SupportArticleView?urlname=How-to-disable-AVG). If it does try disabling the individual components to find the actual culprit. Have a look @ this article (https://support.avg.com/SupportArticleView?urlname=How-to-disable-individual-AVG-components).
AVG Guru

Is Adobe Flash Player installed, up-to-date (latest version is 16.0.0.235 which I installed just 4 days ago), and above all, enabled in Chrome? If that's not it, have you used PC TuneUp?