Setting AVG as default email protection for Outlook

How do I set my Outlook email (updated yesterday) to use AVG as default scanner of incoming emails?
A volunteer technician installed AVAST recently and it has taken over this and other functions.  I would like to delete the Avast completely but it seems not allow this.

Any advice would be greatly appreciated.

Carol Russell

Carol, AVG & AVAST on the system!!.. A complete No No!!.. Have a look @ this article (https://support.avg.com/SupportArticleView?q=prepare&urlname=How-to-prepare-your-computer-for-installing-AVG&l=en_US). Visit the AVAST website for complete removal tool instructions.
AVG Guru

Carol, AVG & AVAST on the system!!.. A complete No No!!.. Have a look @ this article (https://support.avg.com/SupportArticleView?q=prepare&urlname=How-to-prepare-your-computer-for-installing-AVG&l=en_US). Visit the AVAST website for complete removal tool instructions.
AVG Guru