Yes, you can, Rhonda. Its' quite easy to follow the below steps.
Is there any other Antivirus program like McAfee or AVG Antivirus program installed on your system? If so, please uninstall it and make sure that your system date and time is up to date.
Now click this link http://avgclick.me/InstallAV to download your AVG Internet Security program, Run the downloaded file to start the installation process. Follow the instructions on your screen. When prompted, enter your AVG license number.
The license number is sent automatically to your e-mail once purchased. Complete the installation and restart your computer. Please, feel free to let us know if you require any further assistance. Thank you.