virtualbox.org

In the VM settings, the item "Nested VT-x / AMD-v" is inactive.
Hardware virtualization does not work, although the task manager indicates that it is enabled.
Also other programs like "LeoMoon CPU-V" confirm this.
Host - Windows 10 (1909) x64
Guest - XenServer 7.4.0 x64
Processor: Intel i5-35550
In the BIOS settings, the item "Virtualization Technology" is enabled.
In Windows components, Hyper-V is disabled.
At the same time, VM-ware works fine, but it does not suit me.
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When installing XenServer, it warns that hardware virtualization is not working.
If you finish installing XenServer and then install WIndows 7 on it, then when you try to start the Windows 7 x64 virtual machine inside XenServer, it writes: "HVM is Required for this Operation"

Caeles-Lupus wrote: Hardware virtualization does not work, although the task manager indicates that it is enabled.

On the contrary, the log shows that it's working perfectly. However this has nothing to do with providing nested virtualization.

VBox.log wrote: 00:00:03.699267 HM: HMR3Init: VT-x w/ nested paging and unrestricted guest execution hw support

I think your problem is that your processor is too old. The 6.1.0 announcement says that the nested VT-x feature requires 5th generation core i "Broadwell", whereas yours is 3rd generation "Ivy Bridge" (i5-3550).

mpack wrote: I think your problem is that your processor is too old. The 6.1.0 announcement says that the nested VT-x feature requires 5th generation core i "Broadwell", whereas yours is 3rd generation "Ivy Bridge" (i5-3550).

thanks for the answer
So the matter is in the processor. Then there's nothing to be done.
This was a task from the teacher. I’ll tell him that my computer is too old and it’s not my fault.
Thanks again.