Very useful and unknown Windows shotcut keys.

Well if you honestly ask your self what is more convenient way to work by Pressing CTR + C and CTRL + V to do the copy paste operation or right click mouse select Copy option and then again go the desired location and again do the same for paste, 99% people would agree using shortcut keys is more simple and fast.
Using shortcuts keys really improves our productivity to a large extent, and if we know most of the shortcuts keys we can easily minimize the usage of mouse and save a lot of time in our day to day stuff.

I have listed down few of the mostly used and few unknown shortcut keys which will help you immensely.

#	Short Cut	Description
1	ALT + Tab	Switch between windows
2	ALT + Space + X	Maximize window
3	CTRL + Shift + Esc	Task Manager
4	Windows key + Break	System properties
5	Windows key + F	Search
6	Windows key + D	Hide/Display all windows
7	Alt + Esc	Switch between running applications
8	Alt + letter	Select menu item by underlined letter
9	Ctrl + Esc	Open Program Menu
11	Alt + F4	Quit active application or close current window
12	F1	Open Help for active application
13	Windows + M	Minimize all open windows
14	Shift + Windows + M	Undo minimize all open windows
15	Windows + F1	Open Windows Help
16	Windows + Tab	Cycle through the Taskbar buttons
17	Windows + Break	Open the System Properties dialog box