It is actually not necessary to run but after updating the new virus definitions it is better to scan your whole PC using AVG for latest threats and viruses.
This should be done manually and in case if you fail to do this, it is better to setup the post update memory scan so that it will perform this function as soon as the AVG program updates.
Hello Thomas,
Post update memory scan is to run a memory and process scan after each successful update of AVG.
To perform this please follow the instructions mentioned in this link: https://support.avg.com/SupportArticleView?l=en_US&urlName=How-to-start-or-plan-a-computer-scan .Please feel free to contact us should you need any assistance.
What is "Post Update Memory Scan"?
Is it always necessary to run?
Hello Thomas,
Post update memory scan is to run a memory and process scan after each successful update of AVG.
To perform this please follow the instructions mentioned in this link: https://support.avg.com/SupportArticleView?l=en_US&urlName=How-to-start-or-plan-a-computer-scan .Please feel free to contact us should you need any assistance.