There is a weird issue at my office PC. I had Windows 7 desktop. It was working fine. I receive a notification about Windows update. The notification showed me information on some security update. I did not check the details of that and allowed to install. At the time when I left and shutdown the system it showed around 80 updates pending to install. The message on the screen was about installation of update and then only the pc will turn off. I switched off the monitor and went. In the morning when I stared my desktop there was no sound. Also I notice a green bar in the center of video. I am using VLC for viewing my video files. I am not sure how does this happened. Windows update are good right. I allowed the installation and never thought this would happen. Now my audio stopped working and system is slow. What should I do now.
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