Hi all, I have find out the problem, is the Windows Defender configuration called Core Isolation – Memory Integrity, which prevents VirtualBox using hardware virtualization features. I have turned off it and now is working fine. Thanks for the attention. 
Hi, recently I have got a new dell g series laptop, before I had the G3 and now I have a dell g15. I am having CPU issues when starting any virtual machine of any distribution in dell g15. Have anyone faced with this issues? I've tried using vmware and virtualbox and both have the same messages. Those virtual machines worked fine on Dell g3. As some messages say, the CPU model is not certified to the s.o, but there is some workaround? and yes, I have enable the intel virtualization in bios configuration.  [IMAGE][IMAGE]
Dell G15 5511 - CPU virtualization issue.