Bill Gates Admits Ctrl-Alt-Delete was Mistake--Blames on IBM

Isn't the Ctrl-Alt-Delete to login supposed to be in order to prevent a malicious fullscreen app from faking the login screen and tricking the user into entering their login credentials? (Since Ctrl-Alt-Delete is a keystroke that is routed directly to an OS handler at a fairly low level, a mere application can't intercept it.)

There's actually a sound reason, I can't really think of another way to prevent this attack vector.

The article says that. The need for a uninterceptable interrupt to reach the OS login screen is obvious.

The mistake was making it a three-key chord rather than something simpler. Compare to the single home button on iOS devices, which also goes straight to the OS and can't be intercepted by user space programs.

Out of all the things that one can claim is wrong with windows, ctrl+alt+delete to login isnt one I have a problem with.

I pressed that too many times on my PC... Macbook, haven't had to do it once!