Disabling Ctrl+Alt_Del screen at logon in Win7

1. Open RUN dialog using Windows+R
2. Enter command as 'control userpasswords2'
3. Goto 'Advanced' tab of newly opened dialog
4. In Secure logon section, uncheck 'Require users to press Ctrl + Alt + Delete' 
5. Click on 'Apply' button 
And you are done :)
Please use at your own risk. 

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