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I'm using virtualbox with Kali and it's working fine, however I currently only have it using 1 cpu and I'd like to add more.
However when I go to Settings → System → Processor the fields are greyed out and I can't change number of processors (this happens even when kali isn't running). Any help is appreciated
restart, close all processes related to virtualbox of vbox and then open vbox and then try to change. – Hunter – 2014-05-12T04:33:19.023