Take the 2-minute tour ×
Super User is a question and answer site for computer enthusiasts and power users. It's 100% free, no registration required.

Has Microsoft ever offered an explanation for why they require CTRL+ALT+DEL to login? (Yes I know you can disable it, but it is still their preferred method.) It seems like at one point I heard that it was for security since you knew nothing else could trap CTRL+ALT+DEL, but I've written programs that trap CTRL+ALT+DEL, and it isn't that difficult, so I am pretty sure that was just a myth, either that or the decision to require CTRL+ALT+DEL is based on a fallacy.

Either way, I am curious if there is an official reason, and if that reason has any actual merit.

Thanks!

share|improve this question
    
This is a well known key sequence by every Windows users –  Kami Nov 19 '09 at 9:39
2  
Before that, it was a well known key sequence for every MS-DOS user –  Kevin Panko Dec 17 '09 at 0:28
1  
How can you trap the ctrl+alt+del key? Even remote desktop or virtual machine softwares cannot do that and must implement an alternative for this –  Lưu Vĩnh Phúc Oct 22 '13 at 9:19

1 Answer 1

up vote 9 down vote accepted

This is the same as this Server Fault question: How does CTRL-ALT-DEL to log in make Windows more secure?.

Here is the accepted answer from there, by Oskar Duveborn:

The Windows (NT) kernel is designed to reserve the notification of this key combination to a single process: Winlogon. So, as long as the Windows installation itself is working as it should - no third party application can respond to this key combination (if it could, it could present a fake logon window and keylog your password ;)

share|improve this answer
    
Ah, looks like it. Thanks. –  Jim McKeeth Oct 28 '09 at 2:19

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.