Instalation problem

I have purchase Avg Internet Security but when I try to instal it it says instalation is incomplete and another avg product is installed on your computer antd it is not compateble. I don't have other AVG product on my computer.

Hello Dambar,
Thank you for choosing AVG. We see that you have paid for AVG Internet Security license and need help to install it. You seem to have an AVG multidevice program (AVG Zen) installed on your PC which is not compatible with your single PC license.

We request you to run AVG remover tool once on your PC to remove AVG completely and then install AVG Internet Security.
To run remover tool: http://support.avg.com/SupportArticleView?urlname=How-to-uninstall-AVG
To reinstall AVG Internet Security: http://avgclick.me/InstallAV
Please, feel free to let us know if you require any further assistance.