Sometimes doing an incorrect login will cause a redirect to a secure login page, which is what the site should have redirected to in the first place. Just type a fake user name and password in most cases to test this, but be leery about using the same password from other accounts. How to Enable or Disable Ctrl+Alt+Delete Secure Desktop for UAC prompt in Windows When User Account Control (UAC) is enabled, Windows prompts for consent or prompts for credentials of a valid local administrator account before starting a program or task t How to Enable or Disable Secure Sign-in with Ctrl+Alt+Delete in Windows 10 It's important to keep your PC as secure as possible. One way to do this is to enable secure sign-in, which requires users to press Ctrl + Alt + Delete on the lock screen before signing in. This will show you how to enable or disable having to press CTRL+ALT+DELETE before being able to enter your log on credentials in the Windows 7 log on screen.