The Windows key combination Ctrl+Alt+Del can be forwarded from any NoMachine client to a NoMachine Windows host once you are connected to the remote desktop. The steps are:
- connect to your NoMachine Windows remote desktop
- open the NoMachine session menu (Ctrl+Alt+0)
- click on the small icon in the right hand corner as illustrated
Ctrl+Alt+Delete will now be usable in the Windows remote desktop.
As an alternative, you can use the Ctrl+Alt+End key combination to enable the forwarding of Ctrl+Alt+Del. A different shortcut can be defined in the NoMachine client User Interface via the Player preferences -> Input -> Change shortcuts interface.