Enter the BIOS (often pressing Del or F12 while booting) and see with the manual how it is named there. Search for
Virtualization Technology (VT-x), or similar, here shown for an Award BIOS:
Another example if you have lets say an ASUS motherboard is:
The hardware virtualization setting is located in Advanced mode->Advanced tab->CPU Configuration-> Intel Virtualization Technology so yours may look a bit different, but it will be in the same place.
This screen varies depending of your motherboard brand, but it doesn’t matter whatever you find here it will be very similar so just go around and try to find it like we did here.