SuperFast User Switching
This awesome set of toys offered several utilities that were removed by Microsoft for the new PowerToys !! The most important of these is Super-Fast User Switcher.
To use it, hold down the WindowsKey and press Q - once if there is only one other user, or multiple times to cycle through users. It requires that Fast User Switching is enabled (Control Panel/Users).
To get this installed and still have the new PowerToys, do the following:
Download the old Powertoys Here
run the install using the custom option
reinstall the new PowerToys using the custom option and keep SuperFast User Switching