How to Close an iCloud AccountIn Feburary 2016 15,

In Feburary 2016 15,
Navigate to your iOS device's Home screen and launch the Settings app.
Tap 'iCloud,' scroll to the bottom of the iCloud menu and then tap 'Manage Storage.'
Select an application from the list of your installed apps that store data with iCloud. Tap 'Delete All' to clear all data from iCloud.
Tap the 'Manage Storage' back arrow at the top and select another app for which you have data to delete. Repeat Step 3.
Tap the back arrows at the top three times to navigate to the main iCloud menu. Scroll to the bottom and tap 'Delete Account' and then tap 'Delete' again to confirm your wish to remove the iCloud account from the iOS device.
Tap 'Keep On My [Device]' to store content on your iOS device that was once managed by iCloud. Alternately, you can tap 'Delete from My [Device]' to clear it from the device's memory.
Delete iCloud from a Computer
Access the iCloud control panel. On a Mac, launch System Preferences from the Apple menu and select 'iCloud.' On a PC, navigate to the Start screen and select the 'iCloud' tile.
Select the 'Sign Out' button. Choose 'Keep Copy' from the next window to store content on your computer that was once managed by iCloud. Alternately, you can tap 'Delete from Computer' to completely erase it.
Select 'Keep Contacts' if you would like to store the data on your computer or 'Delete Contacts' to erase it.
Restart your computer to put the new settings into effect. You may be prompted to close open apps -- for example, your email client -- as the iCloud account is being removed.
Click 'Done' when the process is complete and click 'OK' to acknowledge the notification about where your PhotoStream content is saved. Close the iCloud control panel.
In Feburary 2016 15,

How to Make a Screen Less Bright Without Having to Access the Control PanelIn Feburary 2016 11,

In Feburary 2016 11,
Look through your laptop keys for a 'Fn' key or a dedicated 'dim display' key. The latter is usually indicated with a picture of a sun with a down arrow next to it, or the sun icon might be hollowed out, giving the appearance of being dim.
Press the 'Dim display' key to reduce screen brightness. You might have to press 'Fn' at the same time.
Hold the 'Fn' key and press the down arrow on your keyboard if you do not have a dedicated 'Dim display' key.
Desktop Monitor
Press the 'Menu' button on your monitor.
Press the arrow keys to select 'Brightness' and press 'Enter' to select the option.
Press the down arrow to reduce brightness.
Press the 'Menu' button to exit the menu, or simply wait a few seconds.
In Feburary 2016 11,