Microsoft Windows, Microsoft Office, or other applications need to be activated when they are first installed on a new computer. They also need to be activated after certain changes to the computer hardware (such as a new hard drive or new network adapter, in some cases).
This article details the process of troubleshooting activation issues for Windows, Office, or another application if you are prompted for activation every time you restart your virtual machine.
However, note that the total number of allowed activations depend on the software package and the licensing agreement for the software. If you have previously activated this software on another computer (or in a Boot Camp partition), or if you exceed the number of activations allowed, you may have to contact the manufacturer to request an additional activation or license.
Note: Because a virtual machine consists of virtual hardware, this hardware is always different from the Mac's hardware. Even if the Windows or the application has been activated in Boot Camp, it will need to be activated again when that Boot Camp partition is used in Fusion. However, if that Boot Camp partition is later imported into Fusion as a virtual machine, activation will not be required a third time.