Hello Everyone, to day i reinstalled my OS and now after installing Avast7 my licence key is no longer valid!!! I purchased it about 2monts a go so have no indea What is going on. is it posible that someone some how stoled my licence from my comp and ust it on other machines??? if yes how can i get it back?? thanx ya’ll.
Hi and welcome to the forum,
are you sure that you haven’t modify the license.avastlic file?
This file is very sensible at any modification.
In any case try to request again the license file here
http://www.avast.com/resend-license-paid.php
thanX much 
myt babe izzz rocking again!!!
You’re welcome 