1. Click Start -> Control Panel -> Performance and Maintenance -> Administrative Tools -> Local Security Policy.
2. When the Local Security Policy window is already open, go to Security Settings \ LocalPolicies \ Security Options.
3. Then look for the policy Interactive logon: Do not require CTRL + ALT + DEL.
4. Double-click the policy and then select Disabled
5. After that close the dialog box by clicking OK and close the Local Security Policy window After you follow the steps above, then before you can log on, you must press Ctrl + Alt + Del first