Virtualisation is a feature of the CPU, and if that has it it's also got to be available as an option in the motherboard BIOS.
Not all machine makers include the facility to enable it on lower-cost models.
The type or version of the operating system makes no difference, virtualisation is a hardware feature.
(Professional advice - Stay with Windows 7 for a software development machine & leave it at least a year before considering Windows 10 on any important machine - give all the other software production companies time to thoroughly test everything on the release version & time for all the bugs that appear due to different machine configurations to be fixed..)
Most machines tell you what the BIOS access key is as you turn them on - eg. "Press DEL to enter CMOS Setup" or something like that.
If it does not display any message, try each of DEL, F1, F2, F3 ESC
For each, turn the machine on then start continuously tapping the key.
If it works, you will see the BIOS setup screen; if not, the machine will boot normally.
If there is not option for virtualisation in the BIOS, that machine simply cannot do it.
For info, NEVER buy a big-name branded desktop PC... Most big makers use non-standard parts and restrict the capabilities of the machines so they cannot be easily upgraded or maintained - they want to sell replacements to normal users and "more capable" [eg. less crippled & more expensive] versions to business users..
Build them yourself or get a local independent shop to build one for you, from standard parts.
[Electronics designer & programmer for 40 years].