Every regular windows user will be familiar with the combination of keys: CTRL+ALT+DEL. This magic combination is used to lock the screen, log in or more often than not force an unresponsive application to close. Other commonly used key combos are CTRL+C and CTRL+V for copying and pasting or F5 to refresh a page in your Internet browser. These common shortcuts are incredibly useful and improve productivity by making tasks that would usually require some pointing and clicking possible with only a few keystrokes.
These are not the only key combos around that can improve your productivity and make your working day a few minutes shorter; in fact there are a lot more. Here are some of the more useful ones: