Quick tip today, remote sessions via tools such as logmein, or gotoassist are become quite common now for remotely supporting PCs.
However a common problem is how do you send a Ctrl-Alt-Delete to a remote PC as pressing this combination only works on the local PC.
Well try one of the following:
Ctrl-Alt-Ins
Ctrl-Alt-End
Ctrl-Alt-Home
These are the commonly used alternatives to get around the problem. For instance LogMeIn uses Ctrl-Alt-Ins.