Well for a start Task Manager is an admin process, so that's only going to work if you run Macro Scheduler as admin. That will have also been the case with Windows 7.
I have no problem using MoveWindow under Windows 10:
This moves Notepad:
MoveWindow>Untitled - Notepad,10,10
And if I start Macro Scheduler as admin this moves Task Manager:
MoveWindow>Task Manager,10,10
But as noted this will NOT work when running Macro Scheduler as standard user because Task Manager is running in a protected admin process. If you need to interact with admin apps then Macro Scheduler also needs to be admin:
http://help.mjtnet.com/article/11-contr ... n-as-admin