AVG updated then Excel files all set to Read Only

Helen,
I understand this must be annoying.
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After an AVG update Excel files set to Read Only.   None of solutions suggested on internet worked.
It has been suggested this is a violation issue with AVG. I need to fix this.

Helen,
I understand this must be annoying.
I've sent you an email to connect to our Remote Expert Technician to help you with the issue. Please check your mailbox and connect to our Remote Team.