1

I can not use another PC. And I bought 3 user.

2

Are there already 3 systems attach to your account ?
https:/my.avast.com

Provide more details on how you try to use the license and what is happening if you do so.

3

Why can’t you use it:

  1. How are you trying to add another PC ?
  2. How many systems do you have avast installed on and the license assigned ?
  3. What avast errors/messages are you getting when you try to add another PC ?