Windows in Virtualbox does not start with more then 1 CPU

Hi , I’ve been trying to install a virtual Windows Server 2016 in Virtualbox. My host is Windows 10 Pro for Workstation. I installed windows server2016 successfully, then i realized that I did not increase the number of CPU , I have AMD Ryzen 9 5900x so I can give 8/24 of Virtual Cores. When …

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