1. Open Folder Options by click the Start (Orb) Button –> type "Folder Options" –> Press Enter
2. Open the View tab and scroll down to the end in Advanced Settings:
3. Check the box Use check boxes to select items
4. Click OK to close the dialog box and You are done.
To use this feature, Open your documents folders and try selecting files and folder. You will see an checkbox appears when you move the mouse over the files and folder items.