Shortcut key to Open Task Manger In Windows PC (Windows 10/8.1/7)
У вашего броузера проблема в совместимости с HTML5
Commonly we use “Ctrl+Alt+Delete” buttons for task manager, but it will open lock screen from their you have to choose task manager, but here I will shows one more shortcut key
Click here for more detail..http://www.bsocialshine.com/2016/10/shortcut-key-to-open-task-manger-in.html