Radnom Music playing on my laptop?

[Hatsune Miku]

Out of nowhere random music was playing on my computer. It wasnt from the website i was on, nothing popped up. It just randomly started played a Christmas song, and while it was playing my USBs stopped working. Whats going on?

[JackOfClubs]

The same thing happened to me. It was really weird. TV was off, noone was near me. And then I got a trojan horse warning from Avast. Then I closed Chrome and it went away. Don't think the USBs stopped working, though I had nothing connected. Scary though.

[Hatsune Miku]

Weird...My USBs only stopped working for about a second
I wonder if it happened to anybody else