system
1
Hello.
I want to buy a license of avast premier.
My PC has 2 OS Windows 7 and Windows 8 at dual boot.
How many licenses i need to buy?
1 or 2?
tnx
One (as far I know). Dual boot in the same computer does not require two licenses.
I would agree with Tech since you aren’t running both OS at the same time. 
Eddy
4
Tech and Bob are right.
You only need to have one license.
system
5
I think must purchase 2 licenses because they are 2 different operating systems even if they are run on the same computer