Mystery audio
 

I bought a new laptop last month with Windows 8 installed. It is taking me some time to get used to it. I am having a problem that I cannot fiqure out. I watched some videos on YOUTUBE the other night, then shut the computer off for the night. Today I went to watch a different video on YOUTUBE and got the audio for last nights video, simultaneously with the audio of the new video. I also have noticed that I get audio from advertisements when I log onto the Internet, from websites I visited previously. Is this a strange quirk of Windows 8, or do I have a setting I need to change (maybe delete History?).

I don't know. Maybe try clearing your cache.