A while ago I noticed in Task Manager that there is a process called
Vmmem running and it's using about 5-15% CPU constantly. A quick duckduckgoing revealed that it's a virtual process that represents the total system usage by VMs.
Alright, so it's not a malware. But I was not running any VMs. Where does it come from? My first suspicion was Docker, which runs Linux containers in a VM. But, I closed the Docker for Windows application, and the
Vmmem was still chugging along, burning CPU. Then I suspected that the Windows Subsystem for Linux might be doing something funny, but no, it wasn't that, because I'm still using version 1, not version 2, which is the one that runs in a VM.
Well, after some more searching, it turns out that in some cases, Docker doesn't clean up properly when quitting and it leaves the VM open. To kill it, you must open the application called
Hyper-V Manager and turn off the VM there manually.
To paraphrase Homer Simpson, "Docker, the cause of, and solution to, all our problems".
I’m publishing this as part of 100 Days To Offload - Day 32.