Alt + F4 : Closes the program
Shift + Del : Deletes the files permanently ( Not stored in Recycle bin )
Alt + Tab : Switches between the windows of opened applications
Windows key + M : Minimises all open applications
CTRL + Alt + Del :Locks / Unlock the computer
Windows key + Shift + M : Maximises the windows of all open applications
CTRL + C : For copying text
CTRL + V: Pasting text
CTRL + X : Cutting ( Deleting ) the text
CTRL + Z : Undos the last operation
CTRL + B : Makes the text in Bold letters
CTRL + U : Underlines the text
CTRL + I : Makes the text in italics.
Print scrn : Copes the contents of full screen to clipboard
F1 : Opens the windows help