20 shortcut Useful keys for New windows 8

Windows Key + C: Opens Charms Bar
Windows Key + I: Access the settings or control panel for active app
Windows Key + Q: Search your applications
Windows Key + Z: Open the apps bar to see all your installed programs


Useful keys for power users
Windows Key + Pause/Break: View machine and system info
Win + X: Menu of advanced options for system management, command prompts, etc.
Windows Key + E: Open Explorer
Windows Key + R: Open Run command
Windows Key + L: Enable Lock screen


Useful keys for active window
Windows Key + Shift + Period(.): Snap current Modern app to the side
Windows Key + Left/Right Arrow: Snap current window to the left/right
Windows Key + Up Arrow: Maximize window
Windows Key + Down: Minimize window
Windows Key + Home: Minimize everything but the active window

Useful keys for display setup
Windows Key + P: Switch displays
Windows Key + D: Switch to Desktop
Windows Key + Comma(,): Peek at Desktop
Useful keys for Search and multitasking
Windows Key + Tab: Like alt tab, but for Modern UI
Windows Key + Number (1,2,3...): Selects active apps on taskbar
Windows Key + Period(.) or Windows Key + T: Cycle through open apps on the taskbar

Common reason to computer display again and again Black screen

We are some times ignored small inner but important thing like that 

At first check your LCD power connector its work properly or not 

 There are many type of problem by which happens black screen basically

it does computer software or hardware problem,once time i install
some application then i also faced kind of problem it was challenge to me
as a hardware user may be its hardware problem just decide to insert my
ram clean my ram after after cleaning ram it work well .....