I left my PC unprotected and my roommates screwed with it so that it constantly plays an audio clip. It repeats every few seconds, often interrupting itself.
I can tell from some brief digging that they went to YouTube in a private browser, downloaded an MP3 with a plugin that I have installed, converted it to WAV, and set something up to play the file. So I know it's a trippy Windows-specific thing if it had to be converted to WAV.
I want to know how they did it (so I can return the favor) and how to find the script or program that is running and terminate it and make it stop running at startup. Can anyone help with that?
Edit: I've confirmed that the program producing the audio events is system32/taskhostw.exe. I don't know if that is a legitimate program (Malwarebytes didn't seem to have a problem with it) but it looks to be an automated thing, so that doesn't tell me what is adding it to Windows' action queue or whatever that exe is reading from.