This innovative security application disables Windows system key combinations, such as Alt+F4, Ctrl+Alt+Del, Alt+Tab and WinKey and then shows security screen over your desktop that would not let anyone except you in! Download FREE trial version now! Computer security is one of the major concerns these days. Many of us have realized already that leaving our computers unprotected may result in data theft which in turn may affect privacy and business operation. According to multiple studies, the majority of information theft crimes are conducted without having network access to target machine.