Not able to install

Hello Mohan,
We are sorry to know that you are unable to install the AVG Internet Security purchased. This error occurs if the old traces of AVG is still present in your computer. In this case, we will email you a link to get connected to the advanced support. Please follow the steps in the email and they will install the product for you.
Thank you

Sir,
i am unable to access my antivirus. whenever i try to Run the dowloaded product an error message comes as: ( 0xe001f96c). how to activate the AVG antivirus please clarify. 
.

Hello Mohan,
We are sorry to know that you are unable to install the AVG Internet Security purchased. This error occurs if the old traces of AVG is still present in your computer. In this case, we will email you a link to get connected to the advanced support. Please follow the steps in the email and they will install the product for you.
Thank you