Shift + Delete = Delete permanently
Alt + F4 = Close or terminate the current program / shutdown the computer from desktop
Alt + F = File or menu option from the current program you are running.
Alt + E = Edit option from the program you will run
Ctrl + S = Save the content you are working on a program. This is really important when you are writing bunch of stuff in Microsoft word. But Sometimes we forget to save the document and later shout for the mistake. This simple shortcut can save the whole document.
Ctrl + F = Find a specific word or sentence. Very useful when you are searching for a specific word or sentence to match your Query.
Ctrl + P = Print a document
Windows key logo (the middle key between Ctrl and Alt) = Star menu
Windows key + D = Minimize all current programs / Maximize current programs . This is very useful key when you need to minimize some programs urgently and maximize it quickly. (there are other keys for maximizing and minimizing but this is better because it can do both the work)
Alt + Tab = Quickly switch between current programs . This also a very useful key when we need to work on many program at a time.
Ctrl+ Tab = Go forward of tab . For example in your internet browser you have opened lots of tabs & if you want to operate the tabs without the help of mouse then this shortcut is very useful.
Ctrl+shift+tab= Go back of Tab. Reverse process of the previous shortcut
All this shortcuts are very useful for saving our time and operating a computer faster. Hope this shortcut will help you.