hi all .my windows is 7 . can i use avast 2015 ? when i am updating virus definition on avast 2015, my avast program automatically update to 2016 !!! i want use avast 2015 and virus definition updating . no program update ! avast 2015 is my love . what i must do ?
Hi jimrako 
I am always curious : Why don’t you want to update to Avast 2016 ?
But if you don’t want to update, select :
Avast - Settings - Update - Program - Settings - Manual update - OK.
Greetz, Red.
Although you can set avast what to do when there is a update, avast has the right to perform a forced update.
The real question is why do you not want the latest version and have the best protection ?
i think avast 2015 is very better on hueristic block on offline system . but avast 2016 for hueristic blocking need to be online !
What makes you think that ?
No matter what, avast needs to be online to give the best protection.
Have a look at the streaming updates you receive every day.