One way to lock a Windows computer from your keyboard is by pressing Ctrl + Alt + Del and then selecting the "Lock" option.
Hosted on MSN
The only keyboard shortcut list you’ll ever need
Keyboard shortcuts are combinations of buttons you can press on your computer keyboard to complete certain actions, like opening and closing files, and copying and pasting text—things you would ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results