poodles,

It is not advisable to run both AVs at the same time.
McAfee and Avast both uses Resident scanners which means that they have an active shield running all the time.

In effect, sometimes the scanners can “detect” each other and cause major conflict.

You can however use one running the shield, and the other as a manual scanner.

Since Avast is in my opinion superior to McAfee, I would not have McAfee at all on my machine.

You can coupled Avast with an online scanner as a backup if you wish: House Call, Kaspersky and others have them.

Good luck and welcome to the forum.
:smiley: