Welcome, Bob!
I am not sure what are you asking though.
Pressing ctrl-alt-del brings me to a screen with options to lock the computer, switch user, change password, log off, and start the task manager.
If you just need the task manager, then you can right-click on the taskbar and choose the task manager from the pop-up menu.
I have never before tried clicking on the task manager icon in the system32 folder - it's so much easier from the taskbar, but I tried it now and it starts the task manager right away, as one would expect.
So, are you saying this is not the behavior you observe? If not, then what exactly happens when you do this?