So, I just got a Allen&Heath ZEDi8 mixer that comes with a activation key for a Cubase LE. I just want to know if I will be able to install it in my two laptops and my pc.

Hi and welcome,

By default Cubase LE is using Sof-eLicenser. You can use this on one computer only. If you want to switch to other computer, you have to Reactivate the license.

If you want to use it on multiple computer, you can buy USB-eLicenser and transfer the license to it (be aware, you cannot transfer it back to the Soft-eLicenser later on). Then you can start Cubase on the computer, where th USB-eLicenser is plugged to.