Error message :0xc0070643 on my internet security won't open to update with newer purchase key

Hi Kathryn,
For help on this issue please try reinstall AVG according to this article.
Thanks

I have had problems with my internet security not opening when I try to boot it. I get the following error message.
Error message: General internal error additional message. MSI engine: failed to install product context;avg product installation msi action failed.

Hi Kathryn,
For help on this issue please try reinstall AVG according to this article.
Thanks