How to open the Aero peek function of the Win7 system

How to open the Aero peek function in the Win7 system?
Method 1
1. Right click on the blank space in the taskbar and click “Attributes”.
2, enter the taskbar and start menu property interface, click the "Taskbar" tab, the following "Use Aero Peek preview desktop", tick, click & ldquo; OK & rdquo;.
Method 2
1. Right click on the “Computer” icon on the desktop and click on the “Properties” button.
2, click on the left side column “ advanced system settings & rdquo; items.
3, enter the "advanced" tab interface, click the "Settings" button under Performance.

4, into the Performance Options window, click on the & ldquo; visual effects & rdquo; tab, locate the Windows look and performance settings list & ldquo; Enable Aero Peek & rdquo ;, tick, click & ldquo; OK & rdquo ;.
Method 3
1. Click the “Start” menu in the lower left corner and open “ Manage Tools” in the “Control Panel”.
2, under the management tool, then open “services & rdquo;.
3, in the right window, find the service named "Desktop Window Manager Session Manager", double-click to open.
4, pop-up interface, click the "General" tab, click the start type drop-down box, select “Auto & rdquo;. Under

5, the service status Click & ldquo; started & rdquo; button and click & ldquo; & rdquo ;, is determined to close the Services dialog box.