You can hide your application from the 'Windows Task Manager'
by naming it with the 'hard space' character.

Eg.
File > Make <project>.exe.
Then in the title box delete the name then
press and hold down the left Alt key and type on the number pad 0160
This has named it as chr(160)
Repeat this for the Product Name as well if you wish.

It will then be displayed as an icon with no name when you press Ctrl_Alt+Delete

You can still save it as the old exe file name,
so don't need to edit it's name in the registry or what ever loads it to the new file.