Have you enabled Hyper-V in Windows 10, that might be the factor causing that utility misrecognised the information about Virtualisation. But I suggest you check whether the VT-x has been enabled on the firmware of your motherboard. If so, and nothing going around with Hyper-V, you might contact with Intel support to replace your processor. I have no ideas whether there are limited editions of that processor without VT.
sorry for the late reply (notification emails somehow ended up in the Junk folder).
I already contacted the motherboard manufacturer and they said that VT-x is already enabled, and there's no way to check that in BIOS.
But the truth is that my motherboard didn't work properly in the first place (USB 3.0 ports didn't work), so they fixed it in 1 month. Maybe there are some other issues with the motherboard, like VT-x support or something...
I will try to get my processor checked out on some other motherboard and see if there's still a problem.
Thank you for your help