Activate AVG Internet Security - Unlimited

Hello Jerome,
I'm sorry to hear about this. I have sent you an email, please follow the email instruction to connect with us remotely. We will check with your installed AVG program and we will help you to activate your AVG Internet Security - Unlimited.
Best regards,
Alok.

When trying to activate AVG Internet Security - Unlimited, I receive the message:
"Action not authorized"
"Remove previous AVG Version from your System"
If I do so: Message is:
"Cannot be done because file is open somewhere else"
What shall I do?
I paid Euro 43,99 for PO Nbr 10735725672 with AVG and it cannotbe installed.
Thank you

Hello Jerome,
I'm sorry to hear about this. I have sent you an email, please follow the email instruction to connect with us remotely. We will check with your installed AVG program and we will help you to activate your AVG Internet Security - Unlimited.
Best regards,
Alok.