The way the UEFI (or BIOS) appears depends on your PC manufacturer. Once you've enabled virtualization and exited the UEFI, your PC will restart.
Important: Only change what you need to in the UEFI (or BIOS). Adjusting other settings might prevent you from accessing Windows.
Instructions based on your PC manufacturer
Choose your PC manufacturer for specific instructions on enabling virtualization. If you don't see your manufacturer listed, refer to your device documentation.
These are external links to the manufacturers' websites.
PC manufacturer
Link
Acer
How to Enable Virtualization Technology on Acer Products
Asus
For PCs with AMD processors:
[Notebook] How to enable or disable AMD Virtualization (AMD-V™) technology?
For PCs with Intel processors:
[Motherboard] How to enable Intel(VMX) Virtualization Technology in the BIOS?
[Notebook] How to enable or disable Intel® Virtualization Technology (VT-x)?
Dell
How To Enable or Disable Hardware Virtualization on Dell Systems | Dell US
HP
HP PCs - Enable Virtualization Technology in the BIOS
Lenovo
How to enable Virtualization Technology on Lenovo PC computers - Lenovo Support US
Microsoft
Virtualization is already enabled on Surface devices.
Instructions based on your UEFI (or BIOS)
If your PC manufacturer isn't listed or you're unsure who it is, you may be able to find instructions for your UEFI (or BIOS). Choose your UEFI firmware developer for specific instructions on enabling virtualization. If you don't see your firmware developer listed, refer to your device documentation.
AMI
Refer to your device's firmware documentation
Phoenix
Refer to your device's firmware documentation