Hey forum goers! I was trying to settle an issue I've been having and it's starting to worry me now. As of two days ago, with my headphones on, I notice a sort of windows esque chime on my computer in the background. I'm currently running Mac Os sierra, but I was wondering if any of you had experienced this or maybe I have a plug-in or website that makes subtle noises similar to window 7/8 update chimes. The only other alternative is someone has access to my desktop and is mirroring everything I'm doing on their computer (sounds slightly farfetched, I know) on their computer . What are some steps I should take to pin point the root of this odd phenomena? Format the hard drive? Or leave everything as is? Thanks everyone for the help in advance!