help duplicate activation code

Hello, I have a problem, I bought your products for 2 weeks, I was given an activation code for surround 7.1 in the kit, I entered the code on my profile and everything became fine, but the problem happened that under my profile on the 2nd computer it asks for an activation code, I wanted you can find out you can duplicate the code to become relevant and be able to conduct in 2 computers ??? Thanks in advance