This isn't even particularly close, but I had a gremlin that I would notice at night time where I'd hear my CPU fan idly spin up and the computer slow down... c

This isn't even particularly close, but I had a gremlin that I would notice at night time where I'd hear my CPU fan idly spin up and the computer slow down... come to find out I was basically getting port scanned and _blasted_ with RDP requests, and since RDP is a nightmare protocol with no rate limiting to speak of, it was obvious that some botnet had found the port I had changed RDP to and was hammering it to try to gain access to my computer. This manifested with svchost.exe maxing out CPU, and digging deeper revealed it was coming from a botnet in... well, who knows where. Obviously that was all the incentive I needed to finally heed my devops friend's warning and disable port forwarding and instead use Tailscale for remote access, but yeesh. Wild to watch happen first-hand.