Virtuozzo license is issued for 4 CPU. It is necessary to configure and run Virtuozzo with issued license on 8 CPU server.
In case it is necessary to run X-CPU licensed Virtuozzo on Y- CPU node (assuming that Y>X), there is a way to let Windows to use less CPUs than it has:
Edit c:\boot.ini and add the following switch there:
Please see more info about boot.ini configuration