AVG is inactive since windows 10's december 13th update

Since last windows 10 update, AVG's components have been deactivated. I am unable to reactivate them, update the anti-virus nor repair it. When I try to repair AVG, I get the error code 0xC0070643 (this the only instance where I get an error message with an error code).

Hello,

We regret for the inconvenience you are facing with installing the AVG program. Please check whether you have installed any other conflicting applications like McAfee, Avast, Norton etc… on your PC, If so please uninstall the conflicting applications.
If not, please follow the instructions on the article http://support.avg.com/SupportArticleView?urlname=How-to-reinstall-AVG to reinstall all the traces of the AVG program and check whether it resolves the issue.
Note : Please use the AVG Remover tool mentioned on the article to uninstall the AVG program more effectively.
If you are still facing any error message please provide us with the screenshot so that we could analyze the issue more better. Please follow the instructions on the article http://avgclick.me/getscreenshot to create the screenshot.
Please feel free to get back to us for further assistance.
Thank you.