I downloaded the avast trial mode and received the free License Key from avast for one year but could not activate it as avast requires an activation code not a key. Help Me !
You said that you downloaded a the "avast trial mode". However you didn't say from where.
The you said that you got a "free license key"
I don't believe that there is there is such a thing as a "free license key".
There is an "activation code" for the Avast Free Anti-Virus.
It sounds to me that you might be confused.
If you download a "Trial Version" then the trial is free for thirty days at which time you have to purchase a "license key".
If you download the "Free Version" then you get an "activation code" good for one year.