1. Double click on the Packet Tracer 5.2 Setup icon
2. In Windows 7, it will ask you for the confirmation for the installation. Click Yes in the dialog box
3. Then, follow the below screenshots and provide confirmation accordingly
if you have less space in the default location as shown above, you can browse and provide another location
if you would like to have both a desktop icon and a Quick Launch icon, then select both the check boxes shown above and click Next
if you want to run Packet tracer, as soon as you install, you can select the above shown check box and then click Finish. Or else click finish without selecting the check box.
OK, now, you are done with the installation and ready to follow the practical sessions along with me. I hope you will enjoy working with packet tracer