In order to select multiple files for an operation such as copying, moving or deleting, you generally use the keyboard and the mouse. But there is a way to select multiple files in Windows 7 using only your mouse, via check boxes.
This feature is not turned on by default. You’ll have to enable it by following the steps below:
1. Click on My Computer, click Organize, and then select "Folder and search options".
2. Click the View tab.
3. In Advanced Settings, scroll down and check the box next to "Use check boxes to select items" and Click OK.
From now on, when you hover your mouse over a file in Windows Explorer, a check box will appear next to it; click it to select the file. Once a file is selected, the checked box remains next to it; if you uncheck it, the box will disappear when you move your mouse away.