system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5:CTRL-ALT-DEL to login?

Windows computers can be configured to require entry of the key combination before it will prompt you for login credentials... Why? What does this do to enhance digital security?

If it does somehow give a big security boost, why isn't it used for other password services (email, online bank)?
gpt
It's a key combination which no program can intercept, because originally it was used to reboot the system. If you type ctrl-alt-del and something happens, you know it's Windows itself that responded to the key press, not some evil program designed to look like the login screen to trick you into giving it your password.