Install upgrade version (X4) to a new laptop (no CD)

I have two upgrade installation CDs, for Endnote 9 and Endnote X4, and serial numbers for the original installation and both upgrades. However, the laptop has no optical disc drive and I cannot use these CDs directly. I downloaded X4 official installer, however, it won’t accept any of the 3 serial numbers as a valid activation code. The number of users for the same license cannot be the reason of the problem. How should I proceed to install Endnote to my laptop?
Best regards, Maria

Hello Maria,

Please contact Account Services to check your serial numbers and Product Keys so that you install EndNote X4.

We are here to help whenever you run into issues.