I use Parallel Desktop 11 in combination with Bitdefender (Continuous anti-virus scanner) on OS X. Parallel Desktop 11 gives me a high CPU usage when using Bootcamp: The cause of this is probably Parallels Control Center, since the are no other CPU or I/O intensive programs running. Parallels Control Center tries to read all kind of random files on my computer. In the example below drives. And some of them have a buffer overflow as result:
Hi Nicos, Could you please try deleting the virtual machine and adding the Boot camp partition once again and then check the CPU usages. Refer to this article.