Avg ultimate (multi device)

Hello Jacques,
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Because of connection problem with my home banking system, after several months of discussion with the IT of the bank, we finally discover that AVG was responsible of these problems. According  to the IT guys from the bank, I desinstall all AVG protection systems as well as the tune up (Have been told that this one is totally useless). Now that all AVG device have been deinstalled, the home bankingsystem works perfectly. 
The only avg program that I have been recommended to reinstall is the ANTI VIRUS SYSTEM. But I don't find the instruction to do this. Should I reinstall the entire AVG ultimate multi device and then desactivate devices that where causing the problems? Yhanks for your help.
Jacques BRAEKMAN

Hello Jacques,
Thank you for contacting AVG Community Support.
We regret the inconvenience caused. We'll check and help you.
We've sent you an email with further details. Please check your inbox/spam folders to find the email and use it to get back to us.
Thank you and keep us updated.