Shrink Disk in WSL2

Ensure Hyper-V installed so you have Optimize-VHD

Shutdown WSL2 with 

wsl --shutdown

In powershell PS  as admin cd into wsl2 dir - e.g. 

[user]\AppData\Local\Packages\CanonicalGroupLimited.Ubuntu20.04onWindows_79rhkp1fndgsc\LocalState

Run: Optimize-VHD -Path ext4.vhdx -Mode full

OR - Look at GitHub - okibcn/wslcompact: Compacts the size of the ever-growing WSL vhdx images.

Kill a service that is stuck on "stopping"

In Admin CMD:

sc queryex [serviceName]

This willl give you the PID

Then 

taskkill /f /pid [PID]