I have an HP Envy 360 laptop from 2018, running Windows 10.

In the last three days, it has had two periods of this vibration. The first time was three days ago when for about an hour or so, it intermittently started to vibrate, coming from the left side of the computer. It doesn’t last more than a minute, and it varies from vibrating again almost immediately to several minutes later.

And right now, it’s had this pattern of vibration for the last forty minutes.

The computer as a whole isn’t technically vibrating but something inside seems to be.