useful keyboard shortcuts

Most of us think that we know almost every shortcut in our windows but we keep finding some useful shortcuts to add in our database , here i am listing some of good keyboard shortcut which would save your time .

Delete an entire word 

Sounds strange ? when we type something then we use delete or backspace for every single letter but by this you can delete entire word . CTRL+BACKSPACE

Zoom in Zoom out

While reading any webpage or typing any mail or some kind of assignment , we often need to adjust our screen by going in zoom in or zoom out option of our browser , by this command you will save good amount of time if you read or type too much stuffs online .
Zoom in : CTRL +
Zoom out : CTRL -

Minimizing all windows at once

Most of are fond of multitasking on our computers , but there is a problem when we open too many windows and in between want to go back to desktop it takes too much time as we need to minimize every single window by clicking minus on its top right . By this command you can do all in one .
WINDOWS +D

Closing  single window or Tab

If you surfing on multiple windows and want to close any one of them , Just hit this
CTRL+W

Bring back a closed browser Tab

Sometime when we surf we close important tab accidentally and it takes hell lot of time to find it again  , by this you can bring back your last lost tab .
CTRL+SHIFT+T

Lock your computer 

Since XP days most of us use login password for our computer to enter , and many of us are already pissed off that in our absense our friends or siblings use our computer . Here is useful if you have a password to Enter
Windows+L