Which version of Office, you want to install ?
Is it a new pack of office or did you have used it before ?
Are you trying to install it on the same computer or this is a new one ?
Can you check the box of the office and let me know, what is exactly mention about the use of the licence, because as far as I know, you can install it on 3 computers but the user should be same on every computer. If the username is ***** ***** this computer then, it will not accept the product key.
Ok, you said that the first product key did not worked also, then how did you install Office on your fisrt computer ?
OK, it means both the codes are not working ?
Sorry, I think there is some confusion, we are not Microsoft support, we are Justanswer.com as you can see the logo of our site, this is a global paid support site, we can help you to solve any problem, but it is not possible for us to provide a new product key for any program, as we are not authorised to do that by any developer. You can only get the duplicate key by calling the number below.
Actually I missed that part, I just thought that your problem is with the activation part, which can happen due to many reasons, but later you said that you got your office activated by a duplicate key provided by MS and this can only happen, if the product key on the pack is wrong.