I would like to activate Avast on a new pc. How can this be done with a single pc license. Basically want to deactivate the license on the old pc and reactivate on the new pc. Am I allowed to do this.
Hello and welcome to the Forum! 
Just delete avast! from your old PC and install it on your new PC.
DJBone
Great thanks. Couldn’t be any easier than that :),
You’re welcome.
DJBone