Wifi adapter not showing up on my HP ENVY 700-210xt

[PROTEUS2]

I had my Desktop connected to the internet modem via an ethernet cable. 

I moved my computer and now want to use the wireless to connect to the modem via wifi. Under Network & Internet, on the LHS, I only see Status, Ethernet, Dial-up, VPN, and Proxy. The wifi option doesn't show up.

On "Change adapter options, when the Network connections screen opens up, only the ethernet (Realtek PCle shows up), the wireless card is not showing up.

Under Devise Manager, I cannot see the wireless card either.

I know my desktop has a wireless card, because I have used it before, some 6 years back. 

Can someone please assist?

[banhien]

@PROTEUS2 

The specs of your machine is

            https://support.hp.com/us-en/document/c03975089

It does NOT have wifi adapter. Did you install a wifi adapter yourself 6 years ago ? What is it ?

Since machine is 9 years old, you can use USB wifi adapter which is much easier than install an internal wifi adapter. There are many USB-wifi adapter around. For example

                https://support.hp.com/us-en/document/c03975089

Regards. 

[cpufxer]

Right click on windows start and go to device manager. See if the WIFI adapter is showing up under network adapters. If not right click at the top of the computer name and scan for changes. Maybe your adapter is disabled or the driver needs to be updated. Go to HP support.com and check to see if you need any update on Drivers and BIOS. Is Wi-Fi  enabled in the BIOS? reply if more help is needed.